Skip to main content
VulnerabilityPublished

CVE-2026-99225: Linux kernel · keys: Check the authorization payload in process keyring searches

Affects Linux kernelSource CVE Database V5

0
Compare

Not known to be exploited · fixed in b86db7993051d05810601654e886a1e78e1fa495 : patch Linux kernel soon.

Data as of 2 Nov 2026, 16:31 UTC

Severity
High

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

Thin evidence

One scorer or none
Patch
Available – fixed in b86db7993051d05810601654e886a1e78e1fa495, b4dfda438fee3c6faa15d9b421c373de6a0e476f, 26949c2e4c461e9e620e935bc22717f36a40b615 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Nov 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 2 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ e59428f721ee096d8a020504ea908a6f0d952735, < b86db7993051d05810601654e886a1e78e1fa495
Fixed in
  • b86db7993051d05810601654e886a1e78e1fa495
LinuxLinuxAffected
  • ≥ e59428f721ee096d8a020504ea908a6f0d952735, < b4dfda438fee3c6faa15d9b421c373de6a0e476f
Fixed in
  • b4dfda438fee3c6faa15d9b421c373de6a0e476f
LinuxLinuxAffected
  • ≥ e59428f721ee096d8a020504ea908a6f0d952735, < 26949c2e4c461e9e620e935bc22717f36a40b615
Fixed in
  • 26949c2e4c461e9e620e935bc22717f36a40b615
LinuxLinuxAffected
  • ≥ e59428f721ee096d8a020504ea908a6f0d952735, < 984a178d54515779a1bee100b92a6cee8777c830
Fixed in
  • 984a178d54515779a1bee100b92a6cee8777c830
LinuxLinuxAffected
  • ≥ e59428f721ee096d8a020504ea908a6f0d952735, < 458cf9715af6aff3ac8d2ec60bd59e9d6236fd0f
Fixed in
  • 458cf9715af6aff3ac8d2ec60bd59e9d6236fd0f
LinuxLinuxAffected
  • ≥ e59428f721ee096d8a020504ea908a6f0d952735, < 49f4e768540d25d8852ef750313afda6a4774871
Fixed in
  • 49f4e768540d25d8852ef750313afda6a4774871

AI-suggested

A fix for this vulnerability is available and has been applied in multiple Linux kernel commits. Users and administrators should update to a fixed Linux kernel version that includes these patches. No additional mitigation actions are required beyond applying the official fix.

Description

CVE-2026-99225 is a vulnerability in the Linux kernel's keyring authorization process. It involves a NULL pointer dereference in the function search_process_keyrings_rcu() due to improper validation and handling of the authorization payload during keyring searches. This flaw can cause a kernel oops (crash) when a descendant process dereferences a cleared payload pointer. The issue is fixed by ensuring the payload is non-NULL before validation and search operations.

References

Community reviews

Loading reviews…