CVE-2026-99225: Linux kernel · keys: Check the authorization payload in process keyring searches
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in b86db7993051d05810601654e886a1e78e1fa495 : patch Linux kernel soon.
Data as of 2 Nov 2026, 16:31 UTC
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
Disclosed: evidence found.
CVE published 2 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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
- git.kernel.org/stable/c/14fb6fad526b35a7ebd121f1dd313abe652e0aa6 (opens in a new tab)
- git.kernel.org/stable/c/458cf9715af6aff3ac8d2ec60bd59e9d6236fd0f (opens in a new tab)
- git.kernel.org/stable/c/7d3d2fffe933e538472ccafe5bbc7109488b9ce3 (opens in a new tab)
- git.kernel.org/stable/c/26949c2e4c461e9e620e935bc22717f36a40b615 (opens in a new tab)
- git.kernel.org/stable/c/984a178d54515779a1bee100b92a6cee8777c830 (opens in a new tab)
- git.kernel.org/stable/c/b86db7993051d05810601654e886a1e78e1fa495 (opens in a new tab)
- git.kernel.org/stable/c/b4dfda438fee3c6faa15d9b421c373de6a0e476f (opens in a new tab)
- git.kernel.org/stable/c/49f4e768540d25d8852ef750313afda6a4774871 (opens in a new tab)