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VulnerabilityPublished Updated

CVE-2026-74327: Linux kernel · vmalloc: fix NULL pointer dereference in is_vm_area_hugepages()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c741485fa09bf5900f76d95424d86316d0a00331 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 18:10 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch
Available – fixed in c741485fa09bf5900f76d95424d86316d0a00331, c55dd3b46c1208d6d2ea737a8aefef4aa4c70cb8, bbd664b7c77f6488cd5652231c0fe01d069a73ea +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Aug 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 6 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 121e6f3258fe393e22c36f61a319be8a4f2c05ae, < c741485fa09bf5900f76d95424d86316d0a00331
Fixed in
  • c741485fa09bf5900f76d95424d86316d0a00331
LinuxLinuxAffected
  • ≥ 121e6f3258fe393e22c36f61a319be8a4f2c05ae, < c55dd3b46c1208d6d2ea737a8aefef4aa4c70cb8
Fixed in
  • c55dd3b46c1208d6d2ea737a8aefef4aa4c70cb8
LinuxLinuxAffected
  • ≥ 121e6f3258fe393e22c36f61a319be8a4f2c05ae, < bbd664b7c77f6488cd5652231c0fe01d069a73ea
Fixed in
  • bbd664b7c77f6488cd5652231c0fe01d069a73ea
LinuxLinuxAffected
  • ≥ 121e6f3258fe393e22c36f61a319be8a4f2c05ae, < b86f98e53df4f5d57259817b8e9a00167b78bae6
Fixed in
  • b86f98e53df4f5d57259817b8e9a00167b78bae6
LinuxLinuxAffected
  • ≥ 121e6f3258fe393e22c36f61a319be8a4f2c05ae, < af71c2b88ccae44418e273bdfe0c96be8515151e
Fixed in
  • af71c2b88ccae44418e273bdfe0c96be8515151e
LinuxLinuxAffected
  • ≥ 121e6f3258fe393e22c36f61a319be8a4f2c05ae, < a1bca6b69bd934e2731d009e645038e05d57ce59
Fixed in
  • a1bca6b69bd934e2731d009e645038e05d57ce59

AI-suggested

A fix is available and has been applied in the Linux kernel after version 5.13. Users and administrators should update to a fixed kernel version containing the referenced commits to remediate this issue.

Description

A NULL pointer dereference vulnerability in the Linux kernel's vmalloc subsystem was fixed. The function is_vm_area_hugepages() did not check if find_vm_area() returned NULL before dereferencing it, which could cause a kernel crash. This issue affects Linux kernel version 5.13.

References

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