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Full vulnerability report · 2026
CVE-2026-63895High confidence

usb: gadget: f_fs: copy only received bytes on short ep0 read

Linux · Linux

…UnscoredAssess manually
Recommended action
Patch only the product branches with a verified fix

No CVSS base score is available from the CNA, CISA ADP or NIST. Absence of a score is not evidence of low risk; review the vendor advisory, affected exposure and exploit evidence. Verified remediation exists for at least one product or source, but 20 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityUnscoredOperational priority:Needs assessment, manual assessment needed.unscored

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.25% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Linux Linux and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Manual assessmentRemediation target: Manual assessment

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 20 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

24 package states
Package result overrides the generic status

BlackTree has verified remediation for at least one product or source, but the relevant distribution still reports no fixed package for 20 affected package states shown here. Treat those rows as affected with no fix until that distribution publishes a fixed version.

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.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.6.12.94-1Debian Security Tracker ↗Source updated 7 Oct 2026
Debian bookwormbookworm · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.6.1.176-1Debian Security Tracker ↗Source updated 7 Oct 2026
Debian forkyforky · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.7.0.12-1Debian Security Tracker ↗Source updated 7 Oct 2026
Debian sidsid · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.7.0.12-1Debian Security Tracker ↗Source updated 7 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinuxAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-awsAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azureAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azure-fdeAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azure-nvidiaAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gcpAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gkeAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gkeopAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-ibmAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-lowlatencyAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-nvidiaAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-nvidia-lowlatencyAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-nvidia-tegraAffected, 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 Ubuntu Security ↗Source updated 6 Oct 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oracleAffected, 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-raspiAffected, 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 Ubuntu Security ↗Source updated 6 Oct 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 Ubuntu Security ↗Source updated 6 Oct 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 Ubuntu Security ↗Source updated 6 Oct 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 Ubuntu Security ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-xilinxAffected, 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 Ubuntu Security ↗Source updated 6 Oct 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-2026-63895 · CSAF 2.0 · revision 11 · interimSUSE Product Security TeamCVE-2026-63895
151 known affected

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

  • kernel-default as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • kernel-default-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • kernel-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • kernel-macros as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • kernel-source as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • reiserfs-kmp-default as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • kernel-default as component of SUSE Linux Enterprise High Performance Computing 15 SP4
  • kernel-default-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP4
  • kernel-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP4
  • kernel-macros as component of SUSE Linux Enterprise High Performance Computing 15 SP4
  • kernel-source as component of SUSE Linux Enterprise High Performance Computing 15 SP4
  • reiserfs-kmp-default as component of SUSE Linux Enterprise High Performance Computing 15 SP4
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: copy only received bytes on short ep0 read ffs_ep0_read() allocates its control-OUT data buffer with kmalloc() (not kzalloc) at the Length value from the Setup packet, then copies that full len to userspace regardless of how many bytes were actually received: data = kmalloc(len, GFP_KERNEL); ... ret = __ffs_ep0_queue_wait(ffs, data, len); if ((ret > 0) && (copy_to_user(buf, data, len))) ret = -EFAULT; __ffs_ep0_queue_wait() returns req->actual, which on a short control OUT transfer is strictly less than len. The copy_to_user() call still copies len bytes, so on a short OUT the last (len - ret) bytes of the kmalloc() buffer -- uninitialised slab residue -- are delivered to the FunctionFS daemon. Short ep0 OUT completions are specified USB control-transfer behavior and are produced by in-tree UDCs: * dwc2 continues on req->actual length for ep0 DATA OUT (short-not-ok is the only ep0-OUT stall path). * aspeed_udc ends ep0 OUT on rx_len ep.maxpacket. * renesas_usbf logs "ep0 short packet" and completes the request. * dwc3 stalls on short IN but not on short OUT. A short ep0 OUT is therefore not evidence of a broken UDC; it is a normal condition f_fs has to cope with. The sibling gadgetfs implementation in drivers/usb/gadget/legacy/inode.c already does this correctly via min(len, dev->req->actual) before copy_to_user(). This patch brings f_fs.c to the same safe pattern rather than trimming at a defensive layer. The bug is reached from the FunctionFS device node, which in real deployments is owned by the privileged gadget daemon (adbd, UMS, composite gadget services, etc.); it is not reachable from unprivileged userspace. Linux host stacks normally reject short-wLength control OUTs before they reach the gadget, so reproducing this required a build that bypasses that host-side check. With the bypass in place, a 1-byte payload on a 64-byte Setup produces 63 bytes of non-canary slab residue in the daemon's read buffer. Fix by copying only ret (actually received) bytes to userspace.
Remediation
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Optional official sources

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

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

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-2026-45668

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 actionPatch only the product branches with a verified fix

No CVSS base score is available from the CNA, CISA ADP or NIST. Absence of a score is not evidence of low risk; review the vendor advisory, affected exposure and exploit evidence. Verified remediation exists for at least one product or source, but 20 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: copy only received bytes on short ep0 read ffs_ep0_read() allocates its control-OUT data buffer with kmalloc() (not kzalloc) at the Length value from the Setup packet, then copies that full len to userspace regardless of how many bytes were actually received: data = kmalloc(len, GFP_KERNEL); ... ret = __ffs_ep0_queue_wait(ffs, data, len); if ((ret > 0) && (copy_to_user(buf, data, len))) ret = -EFAULT; __ffs_ep0_queue_wait() returns req->actual, which on a short control OUT transfer is strictly less than len. The copy_to_user() call still copies len bytes, so on a short OUT the last (len - ret) bytes of the kmalloc() buffer -- uninitialised slab residue -- are delivered to the FunctionFS daemon. Short ep0 OUT completions are specified USB control-transfer behavior and are produced by in-tree UDCs: * dwc2 continues on req->actual < req->length for ep0 DATA OUT (short-not-ok is the only ep0-OUT stall path). * aspeed_udc ends ep0 OUT on rx_len < ep->ep.maxpacket. * renesas_usbf logs "ep0 short packet" and completes the request. * dwc3 stalls on short IN but not on short OUT. A short ep0 OUT is therefore not evidence of a broken UDC; it is a normal condition f_fs has to cope with. The sibling gadgetfs implementation in drivers/usb/gadget/legacy/inode.c already does this correctly via min(len, dev->req->actual) before copy_to_user(). This patch brings f_fs.c to the same safe pattern rather than trimming at a defensive layer. The bug is reached from the FunctionFS device node, which in real deployments is owned by the privileged gadget daemon (adbd, UMS, composite gadget services, etc.); it is not reachable from unprivileged userspace. Linux host stacks normally reject short-wLength control OUTs before they reach the gadget, so reproducing this required a build that bypasses that host-side check. With the bypass in place, a 1-byte payload on a 64-byte Setup produces 63 bytes of non-canary slab residue in the daemon's read buffer. Fix by copying only ret (actually received) bytes to userspace.

What

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: copy only received bytes on short ep0 read ffs_ep0_read() allocates its control-OUT data buffer with kmalloc() (not kzalloc) at the Length value from the Setup packet, then copies that full len to userspace regardless of how many bytes were actually received: data = kmalloc(len, GFP_KERNEL); ... ret = __ffs_ep0_queue_wait(ffs, data, len); if ((ret > 0) && (copy_to_user(buf, data, len))) ret = -EFAULT; __ffs_ep0_queue_wait() returns req->actual, which on a short control OUT transfer is strictly less than len. The copy_to_user() call still copies len bytes, so on a short OUT the last (len - ret) bytes of the kmalloc() buffer -- uninitialised slab residue -- are delivered to the FunctionFS daemon. Short ep0 OUT completions are specified USB control-transfer behavior and are produced by in-tree UDCs: * dwc2 continues on req->actual < req->length for ep0 DATA OUT (short-not-ok is the only ep0-OUT stall path). * aspeed_udc ends ep0 OUT on rx_len < ep->ep.maxpacket. * renesas_usbf logs "ep0 short packet" and completes the request. * dwc3 stalls on short IN but not on short OUT. A short ep0 OUT is therefore not evidence of a broken UDC; it is a normal condition f_fs has to cope with. The sibling gadgetfs implementation in drivers/usb/gadget/legacy/inode.c already does this correctly via min(len, dev->req->actual) before copy_to_user(). This patch brings f_fs.c to the same safe pattern rather than trimming at a defensive layer. The bug is reached from the FunctionFS device node, which in real deployments is owned by the privileged gadget daemon (adbd, UMS, composite gadget services, etc.); it is not reachable from unprivileged userspace. Linux host stacks normally reject short-wLength control OUTs before they reach the gadget, so reproducing this required a build that bypasses that host-side check. With the bypass in place, a 1-byte payload on a 64-byte Setup produces 63 bytes of non-canary slab residue in the daemon's read buffer. Fix by copying only ret (actually received) bytes to userspace.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through the affected interface may attempt exploitation when the stated preconditions are met. 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: usb: gadget: f_fs: copy only received bytes on short ep0 read ffs_ep0_read() allocates its control-OUT data buffer with kmalloc() (not kzalloc) at the Length value from the Setup packet, then copies that full len to userspace regardless of how many bytes were actually received: data = kmalloc(len, GFP_KERNEL); ... ret = __ffs_ep0_queue_wait(ffs, data, len); if ((ret > 0) && (copy_to_user(buf, data, len))) ret = -EFAULT; __ffs_ep0_queue_wait() returns req->actual, which on a short control OUT transfer is strictly less than len. The copy_to_user() call still copies len bytes, so on a short OUT the last (len - ret) bytes of the kmalloc() buffer -- uninitialised slab residue -- are delivered to the FunctionFS daemon. Short ep0 OUT completions are specified USB control-transfer behavior and are produced by in-tree UDCs: * dwc2 continues on req->actual < req->length for ep0 DATA OUT (short-not-ok is the only ep0-OUT stall path). * aspeed_udc ends ep0 OUT on rx_len < ep->ep.maxpacket. * renesas_usbf logs "ep0 short packet" and completes the request. * dwc3 stalls on short IN but not on short OUT. A short ep0 OUT is therefore not evidence of a broken UDC; it is a normal condition f_fs has to cope with. The sibling gadgetfs implementation in drivers/usb/gadget/legacy/inode.c already does this correctly via min(len, dev->req->actual) before copy_to_user(). This patch brings f_fs.c to the same safe pattern rather than trimming at a defensive layer. The bug is reached from the FunctionFS device node, which in real deployments is owned by the privileged gadget daemon (adbd, UMS, composite gadget services, etc.); it is not reachable from unprivileged userspace. Linux host stacks normally reject short-wLength control OUTs before they reach the gadget, so reproducing this required a build that bypasses that host-side check. With the bypass in place, a 1-byte payload on a 64-byte Setup produces 63 bytes of non-canary slab residue in the daemon's read buffer. Fix by copying only ret (actually received) bytes to userspace.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through the affected interface may attempt exploitation when the stated preconditions are met. 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
the affected interface → vulnerable operation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Unspecified
Privileges required
Not stated in the selected CVSS metric
User interaction
Not stated in the selected CVSS metric
Attack complexity
Not stated in the selected CVSS metric
Security boundary
Not stated in the selected CVSS metric
Weakness
?CWE means Common Weakness Enumeration.
CWE not yet assigned
CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
Not available from the selected scoring authority.
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.
A

Official authority intelligence

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

BSI · German · WID-SEC-2026-2403Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

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

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260722Security Bulletin 22 Jul 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 22 Jul 2026, published on 22 July 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1252Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-63886 Référence CVE CVE-2026-63887 https://www.cve.org/CVERecord?id=CVE-2026-63887 Référence CVE CVE-2026-63888 https://www.cve.org/CVERecord?id=CVE-2026-63888 Référence CVE CVE-2026-63889 https://www.cve.org/CVERecord?id=CVE-2026-63889 Référence CVE CVE-2026-63890 https://www.cve.org/CVERecord?id=CVE-2026-63890 Référence CVE CVE-2026-63891 https://www.cve.org/CVERecord?id=CVE-2026-63891 Référence CVE CVE-2026-63892 https://www.cve.org/CVERecord?id=CVE-2026-63892 Référence CVE CVE-2026-63893 https://www.cve.org/CVERecord?id=CVE-2026-63893 Référence CVE CVE-2026-63894 https://www.cve.org/CVERecord?id=CVE-2026-63894 Référence CVE CVE-2026-63895 https://www.cve.org/CVERecord?id=CVE-2026-63895 Référence CVE CVE-2026-63896 https://www.cve.org/CVERecord?id=CVE-2026-63896 Référence CVE CVE-2026-63897 https://www.cve.org/CVERecord?id=CVE-2026-63897 Référence CVE CVE-2026-63898 https://www.cve.org/CVERecord?id=CVE-2026-63898 Référence CVE CVE-2026-63899 https://www.cve.org/CVERecord?id=CVE-2026-63899 Référence CVE CVE-2026-63900 https://www.cve.org/CVERecord?id=CVE-2026-63900 Référence CVE CVE-2026-63901 https://www.cve.org/CVERecord?id=CVE-2026-63901 Référence CVE CVE-2026-63902 https://www.cve.org/CVERecord?id=CVE-2026-63902 Référence CVE CVE-2026-63903 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1229Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-63886 Référence CVE CVE-2026-63887 https://www.cve.org/CVERecord?id=CVE-2026-63887 Référence CVE CVE-2026-63888 https://www.cve.org/CVERecord?id=CVE-2026-63888 Référence CVE CVE-2026-63889 https://www.cve.org/CVERecord?id=CVE-2026-63889 Référence CVE CVE-2026-63890 https://www.cve.org/CVERecord?id=CVE-2026-63890 Référence CVE CVE-2026-63891 https://www.cve.org/CVERecord?id=CVE-2026-63891 Référence CVE CVE-2026-63892 https://www.cve.org/CVERecord?id=CVE-2026-63892 Référence CVE CVE-2026-63893 https://www.cve.org/CVERecord?id=CVE-2026-63893 Référence CVE CVE-2026-63894 https://www.cve.org/CVERecord?id=CVE-2026-63894 Référence CVE CVE-2026-63895 https://www.cve.org/CVERecord?id=CVE-2026-63895 Référence CVE CVE-2026-63896 https://www.cve.org/CVERecord?id=CVE-2026-63896 Référence CVE CVE-2026-63897 https://www.cve.org/CVERecord?id=CVE-2026-63897 Référence CVE CVE-2026-63898 https://www.cve.org/CVERecord?id=CVE-2026-63898 Référence CVE CVE-2026-63899 https://www.cve.org/CVERecord?id=CVE-2026-63899 Référence CVE CVE-2026-63900 https://www.cve.org/CVERecord?id=CVE-2026-63900 Référence CVE CVE-2026-63901 https://www.cve.org/CVERecord?id=CVE-2026-63901 Référence CVE CVE-2026-63902 https://www.cve.org/CVERecord?id=CVE-2026-63902 Référence CVE CVE-2026-63903 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1162Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-63886 Référence CVE CVE-2026-63887 https://www.cve.org/CVERecord?id=CVE-2026-63887 Référence CVE CVE-2026-63888 https://www.cve.org/CVERecord?id=CVE-2026-63888 Référence CVE CVE-2026-63889 https://www.cve.org/CVERecord?id=CVE-2026-63889 Référence CVE CVE-2026-63890 https://www.cve.org/CVERecord?id=CVE-2026-63890 Référence CVE CVE-2026-63891 https://www.cve.org/CVERecord?id=CVE-2026-63891 Référence CVE CVE-2026-63892 https://www.cve.org/CVERecord?id=CVE-2026-63892 Référence CVE CVE-2026-63893 https://www.cve.org/CVERecord?id=CVE-2026-63893 Référence CVE CVE-2026-63894 https://www.cve.org/CVERecord?id=CVE-2026-63894 Référence CVE CVE-2026-63895 https://www.cve.org/CVERecord?id=CVE-2026-63895 Référence CVE CVE-2026-63896 https://www.cve.org/CVERecord?id=CVE-2026-63896 Référence CVE CVE-2026-63897 https://www.cve.org/CVERecord?id=CVE-2026-63897 Référence CVE CVE-2026-63898 https://www.cve.org/CVERecord?id=CVE-2026-63898 Référence CVE CVE-2026-63899 https://www.cve.org/CVERecord?id=CVE-2026-63899 Référence CVE CVE-2026-63900 https://www.cve.org/CVERecord?id=CVE-2026-63900 Référence CVE CVE-2026-63901 https://www.cve.org/CVERecord?id=CVE-2026-63901 Référence CVE CVE-2026-63902 https://www.cve.org/CVERecord?id=CVE-2026-63902 Référence CVE CVE-2026-63903 https://www.cve.org/CVERecord?id=

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

d?id=CVE-2026-63855 Référence CVE CVE-2026-63856 https://www.cve.org/CVERecord?id=CVE-2026-63856 Référence CVE CVE-2026-63861 https://www.cve.org/CVERecord?id=CVE-2026-63861 Référence CVE CVE-2026-63862 https://www.cve.org/CVERecord?id=CVE-2026-63862 Référence CVE CVE-2026-63869 https://www.cve.org/CVERecord?id=CVE-2026-63869 Référence CVE CVE-2026-63882 https://www.cve.org/CVERecord?id=CVE-2026-63882 Référence CVE CVE-2026-63884 https://www.cve.org/CVERecord?id=CVE-2026-63884 Référence CVE CVE-2026-63892 https://www.cve.org/CVERecord?id=CVE-2026-63892 Référence CVE CVE-2026-63893 https://www.cve.org/CVERecord?id=CVE-2026-63893 Référence CVE CVE-2026-63895 https://www.cve.org/CVERecord?id=CVE-2026-63895 Référence CVE CVE-2026-63896 https://www.cve.org/CVERecord?id=CVE-2026-63896 Référence CVE CVE-2026-63897 https://www.cve.org/CVERecord?id=CVE-2026-63897 Référence CVE CVE-2026-63899 https://www.cve.org/CVERecord?id=CVE-2026-63899 Référence CVE CVE-2026-63900 https://www.cve.org/CVERecord?id=CVE-2026-63900 Référence CVE CVE-2026-63901 https://www.cve.org/CVERecord?id=CVE-2026-63901 Référence CVE CVE-2026-63902 https://www.cve.org/CVERecord?id=CVE-2026-63902 Référence CVE CVE-2026-63903 https://www.cve.org/CVERecord?id=CVE-2026-63903 Référence CVE CVE-2026-63904 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1066Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-63886 Référence CVE CVE-2026-63887 https://www.cve.org/CVERecord?id=CVE-2026-63887 Référence CVE CVE-2026-63888 https://www.cve.org/CVERecord?id=CVE-2026-63888 Référence CVE CVE-2026-63889 https://www.cve.org/CVERecord?id=CVE-2026-63889 Référence CVE CVE-2026-63890 https://www.cve.org/CVERecord?id=CVE-2026-63890 Référence CVE CVE-2026-63891 https://www.cve.org/CVERecord?id=CVE-2026-63891 Référence CVE CVE-2026-63892 https://www.cve.org/CVERecord?id=CVE-2026-63892 Référence CVE CVE-2026-63893 https://www.cve.org/CVERecord?id=CVE-2026-63893 Référence CVE CVE-2026-63894 https://www.cve.org/CVERecord?id=CVE-2026-63894 Référence CVE CVE-2026-63895 https://www.cve.org/CVERecord?id=CVE-2026-63895 Référence CVE CVE-2026-63896 https://www.cve.org/CVERecord?id=CVE-2026-63896 Référence CVE CVE-2026-63897 https://www.cve.org/CVERecord?id=CVE-2026-63897 Référence CVE CVE-2026-63898 https://www.cve.org/CVERecord?id=CVE-2026-63898 Référence CVE CVE-2026-63899 https://www.cve.org/CVERecord?id=CVE-2026-63899 Référence CVE CVE-2026-63900 https://www.cve.org/CVERecord?id=CVE-2026-63900 Référence CVE CVE-2026-63901 https://www.cve.org/CVERecord?id=CVE-2026-63901 Référence CVE CVE-2026-63902 https://www.cve.org/CVERecord?id=CVE-2026-63902 Référence CVE CVE-2026-63903 https://www.cve.org/CVERecord?id=

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

d?id=CVE-2026-63871 Référence CVE CVE-2026-63875 https://www.cve.org/CVERecord?id=CVE-2026-63875 Référence CVE CVE-2026-63882 https://www.cve.org/CVERecord?id=CVE-2026-63882 Référence CVE CVE-2026-63883 https://www.cve.org/CVERecord?id=CVE-2026-63883 Référence CVE CVE-2026-63884 https://www.cve.org/CVERecord?id=CVE-2026-63884 Référence CVE CVE-2026-63886 https://www.cve.org/CVERecord?id=CVE-2026-63886 Référence CVE CVE-2026-63892 https://www.cve.org/CVERecord?id=CVE-2026-63892 Référence CVE CVE-2026-63893 https://www.cve.org/CVERecord?id=CVE-2026-63893 Référence CVE CVE-2026-63894 https://www.cve.org/CVERecord?id=CVE-2026-63894 Référence CVE CVE-2026-63895 https://www.cve.org/CVERecord?id=CVE-2026-63895 Référence CVE CVE-2026-63896 https://www.cve.org/CVERecord?id=CVE-2026-63896 Référence CVE CVE-2026-63897 https://www.cve.org/CVERecord?id=CVE-2026-63897 Référence CVE CVE-2026-63899 https://www.cve.org/CVERecord?id=CVE-2026-63899 Référence CVE CVE-2026-63900 https://www.cve.org/CVERecord?id=CVE-2026-63900 Référence CVE CVE-2026-63902 https://www.cve.org/CVERecord?id=CVE-2026-63902 Référence CVE CVE-2026-63903 https://www.cve.org/CVERecord?id=CVE-2026-63903 Référence CVE CVE-2026-63904 https://www.cve.org/CVERecord?id=CVE-2026-63904 Référence CVE CVE-2026-63905 https://www.cve.org/CVERecord?id=

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

d?id=CVE-2026-63886 Référence CVE CVE-2026-63887 https://www.cve.org/CVERecord?id=CVE-2026-63887 Référence CVE CVE-2026-63888 https://www.cve.org/CVERecord?id=CVE-2026-63888 Référence CVE CVE-2026-63889 https://www.cve.org/CVERecord?id=CVE-2026-63889 Référence CVE CVE-2026-63890 https://www.cve.org/CVERecord?id=CVE-2026-63890 Référence CVE CVE-2026-63891 https://www.cve.org/CVERecord?id=CVE-2026-63891 Référence CVE CVE-2026-63892 https://www.cve.org/CVERecord?id=CVE-2026-63892 Référence CVE CVE-2026-63893 https://www.cve.org/CVERecord?id=CVE-2026-63893 Référence CVE CVE-2026-63894 https://www.cve.org/CVERecord?id=CVE-2026-63894 Référence CVE CVE-2026-63895 https://www.cve.org/CVERecord?id=CVE-2026-63895 Référence CVE CVE-2026-63896 https://www.cve.org/CVERecord?id=CVE-2026-63896 Référence CVE CVE-2026-63897 https://www.cve.org/CVERecord?id=CVE-2026-63897 Référence CVE CVE-2026-63898 https://www.cve.org/CVERecord?id=CVE-2026-63898 Référence CVE CVE-2026-63899 https://www.cve.org/CVERecord?id=CVE-2026-63899 Référence CVE CVE-2026-63900 https://www.cve.org/CVERecord?id=CVE-2026-63900 Référence CVE CVE-2026-63901 https://www.cve.org/CVERecord?id=CVE-2026-63901 Référence CVE CVE-2026-63902 https://www.cve.org/CVERecord?id=CVE-2026-63902 Référence CVE CVE-2026-63903 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-2026-63886 Référence CVE CVE-2026-63887 https://www.cve.org/CVERecord?id=CVE-2026-63887 Référence CVE CVE-2026-63888 https://www.cve.org/CVERecord?id=CVE-2026-63888 Référence CVE CVE-2026-63889 https://www.cve.org/CVERecord?id=CVE-2026-63889 Référence CVE CVE-2026-63890 https://www.cve.org/CVERecord?id=CVE-2026-63890 Référence CVE CVE-2026-63891 https://www.cve.org/CVERecord?id=CVE-2026-63891 Référence CVE CVE-2026-63892 https://www.cve.org/CVERecord?id=CVE-2026-63892 Référence CVE CVE-2026-63893 https://www.cve.org/CVERecord?id=CVE-2026-63893 Référence CVE CVE-2026-63894 https://www.cve.org/CVERecord?id=CVE-2026-63894 Référence CVE CVE-2026-63895 https://www.cve.org/CVERecord?id=CVE-2026-63895 Référence CVE CVE-2026-63896 https://www.cve.org/CVERecord?id=CVE-2026-63896 Référence CVE CVE-2026-63897 https://www.cve.org/CVERecord?id=CVE-2026-63897 Référence CVE CVE-2026-63898 https://www.cve.org/CVERecord?id=CVE-2026-63898 Référence CVE CVE-2026-63899 https://www.cve.org/CVERecord?id=CVE-2026-63899 Référence CVE CVE-2026-63900 https://www.cve.org/CVERecord?id=CVE-2026-63900 Référence CVE CVE-2026-63901 https://www.cve.org/CVERecord?id=CVE-2026-63901 Référence CVE CVE-2026-63902 https://www.cve.org/CVERecord?id=CVE-2026-63902 Référence CVE CVE-2026-63903 https://www.cve.org/CVERecord?id=

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.
Fix availability varies by product
Affected
Fixed
Linux: < 2.6.35, 5.15.210 ≤ 5.15.*, 6.1.176 ≤ 6.1.*, 6.6.143 ≤ 6.6.*, 6.12.93 ≤ 6.12.*, 6.18.35 ≤ 6.18.*, 7.0.12 ≤ 7.0.*, 7.1 ≤ *
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 19 Jul 2026 · Last source change 19 Jul 2026, 14:55 UTC · CWE not yet assigned

CVE recordCVE.org · 5.2
CVSS sourceUnavailable
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-2026-45668
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceVendor CSAF · SUSE Product Security Team
CWE sourceUnavailable
NVD statusNVD awaiting enrichment

Missing structured fields: CVSS base score, CWE classification. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

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-2026-45668↗Vendor CSAF · SUSE Product Security Team↗CVE authority or vendor 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-2026-63895 · cve.blacktree.nl