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Full vulnerability report · 2026
CVE-2026-46155High confidence

smb/client: fix out-of-bounds read in smb2_compound_op()

Linux · Linux

9.1CriticalCVSS 3.1
Recommended action
Within 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available
Distribution package intelligence

Ubuntu vendor package status

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

13 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 releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivelinux-aws-6.14Affected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azure-6.11Affected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azure-fde-6.14Affected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azure-nvidia-6.14Affected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gcp-6.11Affected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-hwe-6.11Affected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-lowlatency-hwe-6.11Affected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-nvidia-6.11Affected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oem-6.11Affected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oracle-6.14Affected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-raspi-realtimeAffected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-realtimeAffected, 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 feedCanonical record ↗Source updated 10 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-riscvAffected, 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 feedCanonical record ↗Source updated 10 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-2026-46155 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitykernel: smb/client: fix out-of-bounds read in smb2_compound_op()
22 known affected

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

  • kernel-rt as a component of Red Hat Enterprise Linux 9
  • kernel-rt-core as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-core as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-devel-matched as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-modules as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-modules-core as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-modules-extra as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-modules-internal as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-modules-partner as a component of Red Hat Enterprise Linux 9
Summary
A flaw was found in the Linux kernel's Server Message Block (SMB) client. A remote attacker, acting as a malicious SMB server, could send a specially crafted, truncated response with an oversized buffer length. This could lead to an out-of-bounds read in the smb2_compound_op() function, allowing the attacker to leak sensitive kernel heap memory.
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.
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

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-2026-32782

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 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available
01

What, why and how

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in smb2_compound_op() If a server sends a truncated response but a large OutputBufferLength, and terminates the EA list early, check_wsl_eas() returns success without validating that the entire OutputBufferLength fits within iov_len. Then smb2_compound_op() does: memcpy(idata->wsl.eas, data[0], size[0]); Where size[0] is OutputBufferLength. If iov_len is smaller than size[0], memcpy can read beyond the end of the rsp_iov allocation and leak adjacent kernel heap memory.

What

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in smb2_compound_op() If a server sends a truncated response but a large OutputBufferLength, and terminates the EA list early, check_wsl_eas() returns success without validating that the entire OutputBufferLength fits within iov_len. Then smb2_compound_op() does: memcpy(idata->wsl.eas, data[0], size[0]); Where size[0] is OutputBufferLength. If iov_len is smaller than size[0], memcpy can read beyond the end of the rsp_iov allocation and leak adjacent kernel heap memory.

Why

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

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in smb2_compound_op() If a server sends a truncated response but a large OutputBufferLength, and terminates the EA list early, check_wsl_eas() returns success without validating that the entire OutputBufferLength fits within iov_len. Then smb2_compound_op() does: memcpy(idata->wsl.eas, data[0], size[0]); Where size[0] is OutputBufferLength. If iov_len is smaller than size[0], memcpy can read beyond the end of the rsp_iov allocation and leak adjacent kernel heap memory.

Why

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

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

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
a network path → Out-of-bounds Read → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing 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.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-125
A

Official authority intelligence

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

BSI · German · WID-SEC-W-2026-1700Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen oder andere nicht näher spezifizierte Auswirkungen zu erzielen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0954Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-46146 Référence CVE CVE-2026-46147 https://www.cve.org/CVERecord?id=CVE-2026-46147 Référence CVE CVE-2026-46148 https://www.cve.org/CVERecord?id=CVE-2026-46148 Référence CVE CVE-2026-46149 https://www.cve.org/CVERecord?id=CVE-2026-46149 Référence CVE CVE-2026-46150 https://www.cve.org/CVERecord?id=CVE-2026-46150 Référence CVE CVE-2026-46151 https://www.cve.org/CVERecord?id=CVE-2026-46151 Référence CVE CVE-2026-46152 https://www.cve.org/CVERecord?id=CVE-2026-46152 Référence CVE CVE-2026-46153 https://www.cve.org/CVERecord?id=CVE-2026-46153 Référence CVE CVE-2026-46154 https://www.cve.org/CVERecord?id=CVE-2026-46154 Référence CVE CVE-2026-46155 https://www.cve.org/CVERecord?id=CVE-2026-46155 Référence CVE CVE-2026-46156 https://www.cve.org/CVERecord?id=CVE-2026-46156 Référence CVE CVE-2026-46157 https://www.cve.org/CVERecord?id=CVE-2026-46157 Référence CVE CVE-2026-46158 https://www.cve.org/CVERecord?id=CVE-2026-46158 Référence CVE CVE-2026-46159 https://www.cve.org/CVERecord?id=CVE-2026-46159 Référence CVE CVE-2026-46160 https://www.cve.org/CVERecord?id=CVE-2026-46160 Référence CVE CVE-2026-46161 https://www.cve.org/CVERecord?id=CVE-2026-46161 Référence CVE CVE-2026-46162 https://www.cve.org/CVERecord?id=CVE-2026-46162 Référence CVE CVE-2026-46163 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0926Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-46146 Référence CVE CVE-2026-46147 https://www.cve.org/CVERecord?id=CVE-2026-46147 Référence CVE CVE-2026-46148 https://www.cve.org/CVERecord?id=CVE-2026-46148 Référence CVE CVE-2026-46149 https://www.cve.org/CVERecord?id=CVE-2026-46149 Référence CVE CVE-2026-46150 https://www.cve.org/CVERecord?id=CVE-2026-46150 Référence CVE CVE-2026-46151 https://www.cve.org/CVERecord?id=CVE-2026-46151 Référence CVE CVE-2026-46152 https://www.cve.org/CVERecord?id=CVE-2026-46152 Référence CVE CVE-2026-46153 https://www.cve.org/CVERecord?id=CVE-2026-46153 Référence CVE CVE-2026-46154 https://www.cve.org/CVERecord?id=CVE-2026-46154 Référence CVE CVE-2026-46155 https://www.cve.org/CVERecord?id=CVE-2026-46155 Référence CVE CVE-2026-46156 https://www.cve.org/CVERecord?id=CVE-2026-46156 Référence CVE CVE-2026-46157 https://www.cve.org/CVERecord?id=CVE-2026-46157 Référence CVE CVE-2026-46158 https://www.cve.org/CVERecord?id=CVE-2026-46158 Référence CVE CVE-2026-46159 https://www.cve.org/CVERecord?id=CVE-2026-46159 Référence CVE CVE-2026-46160 https://www.cve.org/CVERecord?id=CVE-2026-46160 Référence CVE CVE-2026-46161 https://www.cve.org/CVERecord?id=CVE-2026-46161 Référence CVE CVE-2026-46162 https://www.cve.org/CVERecord?id=CVE-2026-46162 Référence CVE CVE-2026-46163 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0863Multiples vulnérabilités dans le noyau Linux de Red Hat

d?id=CVE-2026-43450 Référence CVE CVE-2026-43501 https://www.cve.org/CVERecord?id=CVE-2026-43501 Référence CVE CVE-2026-45852 https://www.cve.org/CVERecord?id=CVE-2026-45852 Référence CVE CVE-2026-45984 https://www.cve.org/CVERecord?id=CVE-2026-45984 Référence CVE CVE-2026-46090 https://www.cve.org/CVERecord?id=CVE-2026-46090 Référence CVE CVE-2026-46113 https://www.cve.org/CVERecord?id=CVE-2026-46113 Référence CVE CVE-2026-46116 https://www.cve.org/CVERecord?id=CVE-2026-46116 Référence CVE CVE-2026-46135 https://www.cve.org/CVERecord?id=CVE-2026-46135 Référence CVE CVE-2026-46152 https://www.cve.org/CVERecord?id=CVE-2026-46152 Référence CVE CVE-2026-46155 https://www.cve.org/CVERecord?id=CVE-2026-46155 Référence CVE CVE-2026-46173 https://www.cve.org/CVERecord?id=CVE-2026-46173 Référence CVE CVE-2026-46176 https://www.cve.org/CVERecord?id=CVE-2026-46176 Référence CVE CVE-2026-46181 https://www.cve.org/CVERecord?id=CVE-2026-46181 Référence CVE CVE-2026-46189 https://www.cve.org/CVERecord?id=CVE-2026-46189 Référence CVE CVE-2026-46209 https://www.cve.org/CVERecord?id=CVE-2026-46209 Référence CVE CVE-2026-46227 https://www.cve.org/CVERecord?id=CVE-2026-46227 Référence CVE CVE-2026-46242 https://www.cve.org/CVERecord?id=CVE-2026-46242 Référence CVE CVE-2026-46243 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0861Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-46099 Référence CVE CVE-2026-46100 https://www.cve.org/CVERecord?id=CVE-2026-46100 Référence CVE CVE-2026-46101 https://www.cve.org/CVERecord?id=CVE-2026-46101 Référence CVE CVE-2026-46102 https://www.cve.org/CVERecord?id=CVE-2026-46102 Référence CVE CVE-2026-46103 https://www.cve.org/CVERecord?id=CVE-2026-46103 Référence CVE CVE-2026-46115 https://www.cve.org/CVERecord?id=CVE-2026-46115 Référence CVE CVE-2026-46119 https://www.cve.org/CVERecord?id=CVE-2026-46119 Référence CVE CVE-2026-46135 https://www.cve.org/CVERecord?id=CVE-2026-46135 Référence CVE CVE-2026-46137 https://www.cve.org/CVERecord?id=CVE-2026-46137 Référence CVE CVE-2026-46155 https://www.cve.org/CVERecord?id=CVE-2026-46155 Référence CVE CVE-2026-46185 https://www.cve.org/CVERecord?id=CVE-2026-46185 Référence CVE CVE-2026-46195 https://www.cve.org/CVERecord?id=CVE-2026-46195 Référence CVE CVE-2026-46243 https://www.cve.org/CVERecord?id=CVE-2026-46243 Référence CVE CVE-2026-46244 https://www.cve.org/CVERecord?id=CVE-2026-46244 Référence CVE CVE-2026-46246 https://www.cve.org/CVERecord?id=CVE-2026-46246 Référence CVE CVE-2026-46247 https://www.cve.org/CVERecord?id=CVE-2026-46247 Référence CVE CVE-2026-46249 https://www.cve.org/CVERecord?id=CVE-2026-46249 Référence CVE CVE-2026-46250 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0831Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-46099 Référence CVE CVE-2026-46100 https://www.cve.org/CVERecord?id=CVE-2026-46100 Référence CVE CVE-2026-46101 https://www.cve.org/CVERecord?id=CVE-2026-46101 Référence CVE CVE-2026-46102 https://www.cve.org/CVERecord?id=CVE-2026-46102 Référence CVE CVE-2026-46103 https://www.cve.org/CVERecord?id=CVE-2026-46103 Référence CVE CVE-2026-46115 https://www.cve.org/CVERecord?id=CVE-2026-46115 Référence CVE CVE-2026-46119 https://www.cve.org/CVERecord?id=CVE-2026-46119 Référence CVE CVE-2026-46135 https://www.cve.org/CVERecord?id=CVE-2026-46135 Référence CVE CVE-2026-46137 https://www.cve.org/CVERecord?id=CVE-2026-46137 Référence CVE CVE-2026-46155 https://www.cve.org/CVERecord?id=CVE-2026-46155 Référence CVE CVE-2026-46185 https://www.cve.org/CVERecord?id=CVE-2026-46185 Référence CVE CVE-2026-46195 https://www.cve.org/CVERecord?id=CVE-2026-46195 Référence CVE CVE-2026-46243 https://www.cve.org/CVERecord?id=CVE-2026-46243 Référence CVE CVE-2026-46244 https://www.cve.org/CVERecord?id=CVE-2026-46244 Référence CVE CVE-2026-46246 https://www.cve.org/CVERecord?id=CVE-2026-46246 Référence CVE CVE-2026-46247 https://www.cve.org/CVERecord?id=CVE-2026-46247 Référence CVE CVE-2026-46249 https://www.cve.org/CVERecord?id=CVE-2026-46249 Référence CVE CVE-2026-46250 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0731Multiples vulnérabilités dans les produits Microsoft

mai 2026 Bulletin de sécurité Microsoft CVE-2026-46137 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46138 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46142 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46144 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46145 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46146 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46149 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46150 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46151 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46152 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46155 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46156 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46159 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46160 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46161 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46163 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46164 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46165 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46167 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46168 du 29 mai 2026 Bulletin de sécurité Microsoft CVE-2026-46172 du 29 mai 2026 Bulletin de sécurité Mic

Official advisory
03

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-rt as a component of Red Hat Enterprise Linux 9; kernel-rt-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-extra as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-internal as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-partner as a component of Red Hat Enterprise Linux 9; kernel-rt-devel as a component of Red Hat Enterprise Linux 9; kernel-rt-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-rt-kvm as a component of Red Hat Enterprise Linux 9; kernel-rt-modules as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-core as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-extra as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-partner as a component of Red Hat Enterprise Linux 9; kernel-rt-selftests-internal as a component of Red Hat Enterprise Linux 9; kernel-rt.src as a component of Red Hat Enterprise Linux 9
Fixed
kernel-64k-debug-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-debug-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-debug-devel-matched-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-devel-matched-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-aarch64-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-ppc64le-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-s390x-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-x86_64-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); and 1194 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. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 28 May 2026 · Last source change 5 Aug 2026, 12:30 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-2026-32782
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 →
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    kernel-rt as a component of Red Hat Enterprise Linux 9; kernel-rt-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-extra as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-internal as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-partner as a component of Red Hat Enterprise Linux 9; kernel-rt-devel as a component of Red Hat Enterprise Linux 9; kernel-rt-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-rt-kvm as a component of Red Hat Enterprise Linux 9; kernel-rt-modules as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-core as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-extra as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-partner as a component of Red Hat Enterprise Linux 9; kernel-rt-selftests-internal as a component of Red Hat Enterprise Linux 9; kernel-rt.src as a component of Red Hat Enterprise Linux 9 · Fixed: kernel-64k-debug-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-debug-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-debug-devel-matched-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-devel-matched-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-aarch64-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-ppc64le-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-s390x-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-x86_64-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); and 889 more
    After
    kernel-rt as a component of Red Hat Enterprise Linux 9; kernel-rt-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-extra as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-internal as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-partner as a component of Red Hat Enterprise Linux 9; kernel-rt-devel as a component of Red Hat Enterprise Linux 9; kernel-rt-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-rt-kvm as a component of Red Hat Enterprise Linux 9; kernel-rt-modules as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-core as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-extra as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-partner as a component of Red Hat Enterprise Linux 9; kernel-rt-selftests-internal as a component of Red Hat Enterprise Linux 9; kernel-rt.src as a component of Red Hat Enterprise Linux 9 · Fixed: kernel-64k-debug-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-debug-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-debug-devel-matched-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-64k-devel-matched-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-debuginfo-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debug-devel-matched-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-aarch64-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-ppc64le-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-s390x-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-debuginfo-common-x86_64-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); kernel-devel-0:6.12.0-55.103.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0); and 1194 more
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-32782↗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.
Free version - for non-commercial use only.CVE-2026-46155 · cve.blacktree.nl