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VulnerabilityPublished Updated

CVE-2026-63826: Linux kernel · fbdev: fix use-after-free in store_modes()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c6765f39ed27014ff877b00a2efa494233404e17 : patch Linux kernel soon.

Data as of 30 Oct 2026, 13:33 UTC

Severity
High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
Patch
Available – fixed in c6765f39ed27014ff877b00a2efa494233404e17, 3047319e44f1368370f6fa2c04dea2961fb10215, 5267eab88fa4c684459504b8be577ad64953b9a6 +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c6765f39ed27014ff877b00a2efa494233404e17
Fixed in
  • c6765f39ed27014ff877b00a2efa494233404e17
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3047319e44f1368370f6fa2c04dea2961fb10215
Fixed in
  • 3047319e44f1368370f6fa2c04dea2961fb10215
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5267eab88fa4c684459504b8be577ad64953b9a6
Fixed in
  • 5267eab88fa4c684459504b8be577ad64953b9a6
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 70f1e000b88cfa8ca3fd7f4d082647fc089a7769
Fixed in
  • 70f1e000b88cfa8ca3fd7f4d082647fc089a7769
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2c1c805c65fb7dc7524e20376d6987721e73a0b1
Fixed in
  • 2c1c805c65fb7dc7524e20376d6987721e73a0b1
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0d35f9f194a858567a21017d69318a51e3a822b9
Fixed in
  • 0d35f9f194a858567a21017d69318a51e3a822b9

AI-suggested

A fix has been implemented in the Linux kernel source code, clearing stale pointers before freeing the mode list in store_modes(). Users and administrators should update to a Linux kernel version that includes the fix identified by the commits c6765f39ed27014ff877b00a2efa494233404e17 and others listed. No additional mitigation is required beyond applying the official patch.

Description

A use-after-free vulnerability was identified and fixed in the Linux kernel's framebuffer device (fbdev) subsystem, specifically in the store_modes() function. The issue arises because pointers to freed mode lists remain stale and are dereferenced later, leading to use-after-free reads. The fix involves clearing these pointers before freeing the old mode list to prevent invalid memory access.

References

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