BlackTreeIndependent security intelligence

Full vulnerability report · 2026

CVE-2026-64191High confidence

i2c: stub: Reject I2C block transfers with invalid length

Linux · Linux

7.8HighCVSS 3.1

Recommended action

Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available

Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

20 package states

Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu release	Source package	Vendor state	Fixed version	Evidence
Ubuntu 24.04 LTSnoble · standard archive	`linux`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-aws`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-azure`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-azure-fde`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-azure-nvidia`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-gcp`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-gke`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-gkeop`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-ibm`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-lowlatency`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-nvidia`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-nvidia-lowlatency`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-nvidia-tegra`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-oem-6.11`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-oracle`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-raspi`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-raspi-realtime`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-realtime`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-riscv`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-xilinx`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 9 Sept 2026

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current

CVE-2026-64191 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitykernel: i2c: stub: Reject I2C block transfers with invalid length

126 known affected

The vendor explicitly identifies these products as affected by this CVE.

kernel as a component of Red Hat Enterprise Linux 10
kernel-64k as a component of Red Hat Enterprise Linux 10
kernel-64k-core as a component of Red Hat Enterprise Linux 10
kernel-64k-debug as a component of Red Hat Enterprise Linux 10
kernel-64k-debug-core as a component of Red Hat Enterprise Linux 10
kernel-64k-debug-devel as a component of Red Hat Enterprise Linux 10
kernel-64k-debug-devel-matched as a component of Red Hat Enterprise Linux 10
kernel-64k-debug-modules as a component of Red Hat Enterprise Linux 10
kernel-64k-debug-modules-core as a component of Red Hat Enterprise Linux 10
kernel-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 10
kernel-64k-devel as a component of Red Hat Enterprise Linux 10
kernel-64k-devel-matched as a component of Red Hat Enterprise Linux 10

Summary: A flaw was found in the Linux kernel's `i2c-stub` driver. A local user with access to the `/dev/i2c-*` device can exploit this vulnerability by issuing an I2C System Management Bus (SMBus) input/output control (ioctl) command with a specially crafted block transfer length. This invalid length can cause the driver to read or write beyond the allocated buffer, leading to a stack-out-of-bounds error and a system crash, resulting in a Denial of Service (DoS).
Remediation: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current

ENISA EUVD identifier

EUVD-2026-46011

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state: Present in the current official mapping
Known exploitation: Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score: Not supplied in the stored EUVD record
Advisory evidence: No linked advisory details stored yet

Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available

What, why and how

In the Linux kernel, the following vulnerability has been resolved: i2c: stub: Reject I2C block transfers with invalid length The I2C_SMBUS_I2C_BLOCK_DATA case in stub_xfer() uses data->block[0] as the transfer length. The existing check only clamps it to avoid overrunning the chip->words[256] register array, but does not validate it against I2C_SMBUS_BLOCK_MAX (32), which is the limit of the union i2c_smbus_data.block buffer (34 bytes total). The driver is a development/test tool (CONFIG_I2C_STUB=m, not built by default) that must be loaded with a chip_addr= parameter. A local user with access to /dev/i2c-* can issue an I2C_SMBUS ioctl with I2C_SMBUS_I2C_BLOCK_DATA and data->block[0] > 32, causing stub_xfer() to read or write past the end of the union i2c_smbus_data.block buffer: BUG: KASAN: stack-out-of-bounds in stub_xfer (drivers/i2c/i2c-stub.c:223) Read of size 1 at addr ffff88800abcfd92 by task exploit/81 Call Trace: <TASK> stub_xfer (drivers/i2c/i2c-stub.c:223) __i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:593) i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:536) i2cdev_ioctl_smbus (drivers/i2c/i2c-dev.c:391) i2cdev_ioctl (drivers/i2c/i2c-dev.c:478) __x64_sys_ioctl (fs/ioctl.c:583) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) </TASK> The bug exists because i2c-stub implements .smbus_xfer directly, bypassing the I2C_SMBUS_BLOCK_MAX validation in i2c_smbus_xfer_emulated(). The I2C_SMBUS_BLOCK_DATA case in the same function correctly validates against I2C_SMBUS_BLOCK_MAX, but the I2C_SMBUS_I2C_BLOCK_DATA case does not. Fix by rejecting transfers with data->block[0] == 0 or data->block[0] > I2C_SMBUS_BLOCK_MAX with -EINVAL, consistent with both the I2C_SMBUS_BLOCK_DATA case in the same function and the I2C_SMBUS_I2C_BLOCK_DATA validation in i2c_smbus_xfer_emulated().

What

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: local access → Out-of-bounds Read → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface: Local
Privileges required: Low: a basic authenticated account is required
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-125 ↗
CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.

CWE-125

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-46011Official EUVD mapping

0 linked advisory records.

Official EUVD record

BSI · German · WID-SEC-W-2026-2427Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen, möglicherweise um Daten zu manipulieren oder offenzulegen, Sicherheitsmaßnahmen zu umgehen oder einen Denial-of-Service-Zustand zu verursachen.

Official advisory

CERT-FR · French · CERTFR-2026-AVI-1091Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-64089 Référence CVE CVE-2026-64106 https://www.cve.org/CVERecord?id=CVE-2026-64106 Référence CVE CVE-2026-64114 https://www.cve.org/CVERecord?id=CVE-2026-64114 Référence CVE CVE-2026-64174 https://www.cve.org/CVERecord?id=CVE-2026-64174 Référence CVE CVE-2026-64179 https://www.cve.org/CVERecord?id=CVE-2026-64179 Référence CVE CVE-2026-64182 https://www.cve.org/CVERecord?id=CVE-2026-64182 Référence CVE CVE-2026-64183 https://www.cve.org/CVERecord?id=CVE-2026-64183 Référence CVE CVE-2026-64187 https://www.cve.org/CVERecord?id=CVE-2026-64187 Référence CVE CVE-2026-64189 https://www.cve.org/CVERecord?id=CVE-2026-64189 Référence CVE CVE-2026-64191 https://www.cve.org/CVERecord?id=CVE-2026-64191 Référence CVE CVE-2026-64220 https://www.cve.org/CVERecord?id=CVE-2026-64220 Référence CVE CVE-2026-64221 https://www.cve.org/CVERecord?id=CVE-2026-64221 Référence CVE CVE-2026-64223 https://www.cve.org/CVERecord?id=CVE-2026-64223 Référence CVE CVE-2026-64231 https://www.cve.org/CVERecord?id=CVE-2026-64231 Référence CVE CVE-2026-64234 https://www.cve.org/CVERecord?id=CVE-2026-64234 Référence CVE CVE-2026-64242 https://www.cve.org/CVERecord?id=CVE-2026-64242 Référence CVE CVE-2026-64298 https://www.cve.org/CVERecord?id=CVE-2026-64298 Référence CVE CVE-2026-64330 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2026-AVI-1092Multiples vulnérabilités dans le noyau Linux de Red Hat

d?id=CVE-2026-53016 Référence CVE CVE-2026-53059 https://www.cve.org/CVERecord?id=CVE-2026-53059 Référence CVE CVE-2026-53131 https://www.cve.org/CVERecord?id=CVE-2026-53131 Référence CVE CVE-2026-53185 https://www.cve.org/CVERecord?id=CVE-2026-53185 Référence CVE CVE-2026-53268 https://www.cve.org/CVERecord?id=CVE-2026-53268 Référence CVE CVE-2026-63886 https://www.cve.org/CVERecord?id=CVE-2026-63886 Référence CVE CVE-2026-63888 https://www.cve.org/CVERecord?id=CVE-2026-63888 Référence CVE CVE-2026-63913 https://www.cve.org/CVERecord?id=CVE-2026-63913 Référence CVE CVE-2026-64189 https://www.cve.org/CVERecord?id=CVE-2026-64189 Référence CVE CVE-2026-64191 https://www.cve.org/CVERecord?id=CVE-2026-64191 Référence CVE CVE-2026-64276 https://www.cve.org/CVERecord?id=CVE-2026-64276 Référence CVE CVE-2026-64277 https://www.cve.org/CVERecord?id=CVE-2026-64277 Référence CVE CVE-2026-64320 https://www.cve.org/CVERecord?id=CVE-2026-64320 Référence CVE CVE-2026-74581 https://www.cve.org/CVERecord?id=CVE-2026-74581 Gestion détaillée du document le 28 août 2026 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la

Official advisory

CERT-FR · French · CERTFR-2026-AVI-1064Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-64106 Référence CVE CVE-2026-64157 https://www.cve.org/CVERecord?id=CVE-2026-64157 Référence CVE CVE-2026-64158 https://www.cve.org/CVERecord?id=CVE-2026-64158 Référence CVE CVE-2026-64174 https://www.cve.org/CVERecord?id=CVE-2026-64174 Référence CVE CVE-2026-64182 https://www.cve.org/CVERecord?id=CVE-2026-64182 Référence CVE CVE-2026-64183 https://www.cve.org/CVERecord?id=CVE-2026-64183 Référence CVE CVE-2026-64187 https://www.cve.org/CVERecord?id=CVE-2026-64187 Référence CVE CVE-2026-64188 https://www.cve.org/CVERecord?id=CVE-2026-64188 Référence CVE CVE-2026-64189 https://www.cve.org/CVERecord?id=CVE-2026-64189 Référence CVE CVE-2026-64191 https://www.cve.org/CVERecord?id=CVE-2026-64191 Référence CVE CVE-2026-64220 https://www.cve.org/CVERecord?id=CVE-2026-64220 Référence CVE CVE-2026-64221 https://www.cve.org/CVERecord?id=CVE-2026-64221 Référence CVE CVE-2026-64223 https://www.cve.org/CVERecord?id=CVE-2026-64223 Référence CVE CVE-2026-64231 https://www.cve.org/CVERecord?id=CVE-2026-64231 Référence CVE CVE-2026-64233 https://www.cve.org/CVERecord?id=CVE-2026-64233 Référence CVE CVE-2026-64234 https://www.cve.org/CVERecord?id=CVE-2026-64234 Référence CVE CVE-2026-64241 https://www.cve.org/CVERecord?id=CVE-2026-64241 Référence CVE CVE-2026-64242 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2026-AVI-0982Multiples vulnérabilités dans le noyau Linux de Debian LTS

d?id=CVE-2026-63829 Référence CVE CVE-2026-63830 https://www.cve.org/CVERecord?id=CVE-2026-63830 Référence CVE CVE-2026-63831 https://www.cve.org/CVERecord?id=CVE-2026-63831 Référence CVE CVE-2026-63834 https://www.cve.org/CVERecord?id=CVE-2026-63834 Référence CVE CVE-2026-63835 https://www.cve.org/CVERecord?id=CVE-2026-63835 Référence CVE CVE-2026-63836 https://www.cve.org/CVERecord?id=CVE-2026-63836 Référence CVE CVE-2026-64187 https://www.cve.org/CVERecord?id=CVE-2026-64187 Référence CVE CVE-2026-64188 https://www.cve.org/CVERecord?id=CVE-2026-64188 Référence CVE CVE-2026-64189 https://www.cve.org/CVERecord?id=CVE-2026-64189 Référence CVE CVE-2026-64191 https://www.cve.org/CVERecord?id=CVE-2026-64191 Référence CVE CVE-2026-64206 https://www.cve.org/CVERecord?id=CVE-2026-64206 Référence CVE CVE-2026-64248 https://www.cve.org/CVERecord?id=CVE-2026-64248 Référence CVE CVE-2026-64249 https://www.cve.org/CVERecord?id=CVE-2026-64249 Référence CVE CVE-2026-64250 https://www.cve.org/CVERecord?id=CVE-2026-64250 Référence CVE CVE-2026-64252 https://www.cve.org/CVERecord?id=CVE-2026-64252 Référence CVE CVE-2026-64266 https://www.cve.org/CVERecord?id=CVE-2026-64266 Référence CVE CVE-2026-64268 https://www.cve.org/CVERecord?id=CVE-2026-64268 Référence CVE CVE-2026-64269 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2026-AVI-0957Multiples vulnérabilités dans le noyau Linux de Debian LTS

d?id=CVE-2026-63827 Référence CVE CVE-2026-63828 https://www.cve.org/CVERecord?id=CVE-2026-63828 Référence CVE CVE-2026-63830 https://www.cve.org/CVERecord?id=CVE-2026-63830 Référence CVE CVE-2026-63831 https://www.cve.org/CVERecord?id=CVE-2026-63831 Référence CVE CVE-2026-63833 https://www.cve.org/CVERecord?id=CVE-2026-63833 Référence CVE CVE-2026-63834 https://www.cve.org/CVERecord?id=CVE-2026-63834 Référence CVE CVE-2026-63835 https://www.cve.org/CVERecord?id=CVE-2026-63835 Référence CVE CVE-2026-63836 https://www.cve.org/CVERecord?id=CVE-2026-63836 Référence CVE CVE-2026-64188 https://www.cve.org/CVERecord?id=CVE-2026-64188 Référence CVE CVE-2026-64191 https://www.cve.org/CVERecord?id=CVE-2026-64191 Référence CVE CVE-2026-64246 https://www.cve.org/CVERecord?id=CVE-2026-64246 Référence CVE CVE-2026-64249 https://www.cve.org/CVERecord?id=CVE-2026-64249 Référence CVE CVE-2026-64252 https://www.cve.org/CVERecord?id=CVE-2026-64252 Référence CVE CVE-2026-64254 https://www.cve.org/CVERecord?id=CVE-2026-64254 Référence CVE CVE-2026-64529 https://www.cve.org/CVERecord?id=CVE-2026-64529 Gestion détaillée du document le 31 juillet 2026 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gou

Official advisory

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Patch available
Affected: kernel as a component of Red Hat Enterprise Linux 10; kernel-64k as a component of Red Hat Enterprise Linux 10; kernel-64k-core as a component of Red Hat Enterprise Linux 10; kernel-64k-debug as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-core as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-devel as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-modules as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-modules-core as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 10; kernel-64k-devel as a component of Red Hat Enterprise Linux 10; kernel-64k-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-64k-modules as a component of Red Hat Enterprise Linux 10; kernel-64k-modules-core as a component of Red Hat Enterprise Linux 10; kernel-64k-modules-extra as a component of Red Hat Enterprise Linux 10; kernel-abi-stablelists as a component of Red Hat Enterprise Linux 10; kernel-core as a component of Red Hat Enterprise Linux 10; kernel-debug as a component of Red Hat Enterprise Linux 10; kernel-debug-core as a component of Red Hat Enterprise Linux 10; kernel-debug-devel as a component of Red Hat Enterprise Linux 10; kernel-debug-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-debug-modules as a component of Red Hat Enterprise Linux 10; kernel-debug-modules-core as a component of Red Hat Enterprise Linux 10; kernel-debug-modules-extra as a component of Red Hat Enterprise Linux 10; kernel-debug-uki-virt as a component of Red Hat Enterprise Linux 10; kernel-devel as a component of Red Hat Enterprise Linux 10; kernel-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-doc as a component of Red Hat Enterprise Linux 10; kernel-modules as a component of Red Hat Enterprise Linux 10; kernel-modules-core as a component of Red Hat Enterprise Linux 10; and 96 more
Fixed: kernel-64k-debug-debuginfo-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-64k-debug-devel-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-64k-debug-devel-matched-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-64k-debuginfo-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-64k-devel-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-64k-devel-matched-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-debuginfo-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-debuginfo-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-debuginfo-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-debuginfo-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-matched-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-matched-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-matched-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-matched-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-common-aarch64-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-common-ppc64le-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-common-s390x-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-common-x86_64-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-devel-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-devel-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-devel-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-devel-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); and 900 more
Action: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.
Workaround: No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.

Evidence and provenance

Published 20 Jul 2026 · Last source change 5 Aug 2026, 12:39 UTC · CWE-125 · Out-of-bounds Read

CVE recordCVE.org · 5.2

CVSS sourceCNA

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-08-14

European sourceENISA EUVD · EUVD-2026-46011

Product sourceVendor CSAF · Red Hat Product Security

Remediation sourceVendor CSAF · Red Hat Product Security

CWE sourceNIST NVD

NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

9 Sept 2026, 07:35 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
kernel as a component of Red Hat Enterprise Linux 10; kernel-64k as a component of Red Hat Enterprise Linux 10; kernel-64k-core as a component of Red Hat Enterprise Linux 10; kernel-64k-debug as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-core as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-devel as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-modules as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-modules-core as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 10; kernel-64k-devel as a component of Red Hat Enterprise Linux 10; kernel-64k-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-64k-modules as a component of Red Hat Enterprise Linux 10; kernel-64k-modules-core as a component of Red Hat Enterprise Linux 10; kernel-64k-modules-extra as a component of Red Hat Enterprise Linux 10; kernel-abi-stablelists as a component of Red Hat Enterprise Linux 10; kernel-core as a component of Red Hat Enterprise Linux 10; kernel-debug as a component of Red Hat Enterprise Linux 10; kernel-debug-core as a component of Red Hat Enterprise Linux 10; kernel-debug-devel as a component of Red Hat Enterprise Linux 10; kernel-debug-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-debug-modules as a component of Red Hat Enterprise Linux 10; kernel-debug-modules-core as a component of Red Hat Enterprise Linux 10; kernel-debug-modules-extra as a component of Red Hat Enterprise Linux 10; kernel-debug-uki-virt as a component of Red Hat Enterprise Linux 10; kernel-devel as a component of Red Hat Enterprise Linux 10; kernel-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-doc as a component of Red Hat Enterprise Linux 10; kernel-modules as a component of Red Hat Enterprise Linux 10; kernel-modules-core as a component of Red Hat Enterprise Linux 10; and 96 more · Fixed: kernel-64k-debug-debuginfo-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-64k-debug-devel-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-64k-debug-devel-matched-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-64k-debuginfo-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-64k-devel-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-64k-devel-matched-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-debuginfo-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-debuginfo-0:5.14.0-687.42.1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-debuginfo-0:5.14.0-687.42.1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-debuginfo-0:5.14.0-687.42.1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-devel-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-devel-0:5.14.0-687.42.1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-devel-0:5.14.0-687.42.1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-devel-0:5.14.0-687.42.1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-devel-matched-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-devel-matched-0:5.14.0-687.42.1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-devel-matched-0:5.14.0-687.42.1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debug-devel-matched-0:5.14.0-687.42.1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debuginfo-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debuginfo-0:5.14.0-687.42.1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debuginfo-0:5.14.0-687.42.1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debuginfo-0:5.14.0-687.42.1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debuginfo-common-aarch64-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debuginfo-common-ppc64le-0:5.14.0-687.42.1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debuginfo-common-s390x-0:5.14.0-687.42.1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-debuginfo-common-x86_64-0:5.14.0-687.42.1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-devel-0:5.14.0-687.42.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-devel-0:5.14.0-687.42.1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-devel-0:5.14.0-687.42.1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); kernel-devel-0:5.14.0-687.42.1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); and 423 more
After
kernel as a component of Red Hat Enterprise Linux 10; kernel-64k as a component of Red Hat Enterprise Linux 10; kernel-64k-core as a component of Red Hat Enterprise Linux 10; kernel-64k-debug as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-core as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-devel as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-modules as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-modules-core as a component of Red Hat Enterprise Linux 10; kernel-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 10; kernel-64k-devel as a component of Red Hat Enterprise Linux 10; kernel-64k-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-64k-modules as a component of Red Hat Enterprise Linux 10; kernel-64k-modules-core as a component of Red Hat Enterprise Linux 10; kernel-64k-modules-extra as a component of Red Hat Enterprise Linux 10; kernel-abi-stablelists as a component of Red Hat Enterprise Linux 10; kernel-core as a component of Red Hat Enterprise Linux 10; kernel-debug as a component of Red Hat Enterprise Linux 10; kernel-debug-core as a component of Red Hat Enterprise Linux 10; kernel-debug-devel as a component of Red Hat Enterprise Linux 10; kernel-debug-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-debug-modules as a component of Red Hat Enterprise Linux 10; kernel-debug-modules-core as a component of Red Hat Enterprise Linux 10; kernel-debug-modules-extra as a component of Red Hat Enterprise Linux 10; kernel-debug-uki-virt as a component of Red Hat Enterprise Linux 10; kernel-devel as a component of Red Hat Enterprise Linux 10; kernel-devel-matched as a component of Red Hat Enterprise Linux 10; kernel-doc as a component of Red Hat Enterprise Linux 10; kernel-modules as a component of Red Hat Enterprise Linux 10; kernel-modules-core as a component of Red Hat Enterprise Linux 10; and 96 more · Fixed: kernel-64k-debug-debuginfo-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-64k-debug-devel-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-64k-debug-devel-matched-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-64k-debuginfo-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-64k-devel-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-64k-devel-matched-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-debuginfo-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-debuginfo-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-debuginfo-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-debuginfo-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-matched-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-matched-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-matched-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debug-devel-matched-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-common-aarch64-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-common-ppc64le-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-common-s390x-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-debuginfo-common-x86_64-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-devel-0:5.14.0-570.140.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-devel-0:5.14.0-570.140.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-devel-0:5.14.0-570.140.1.el9_6.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); kernel-devel-0:5.14.0-570.140.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6); and 900 more
Red Hat Product Security ↗

2026-07-20CVE published

2026-08-05Fixed release or patch reference recorded

ENISA EUVD · EUVD-2026-46011↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Patch or update reference↗Patch or update reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

i2c: stub: Reject I2C block transfers with invalid length

National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

EUVD-2026-46011

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.