CVE-2026-74399: Linux kernel · evm: terminate and bound the evm_xattrs read buffer
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in a36cbfb85f26e6c6fb6529b1a364331b94dc88f3 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 18:03 UTC
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 a36cbfb85f26e6c6fb6529b1a364331b94dc88f3, a0f64cf8bfcb39e533d9e27aeb763a8d81b7f39d, 11143a19f5b8dc8f414deab87571134f9f447313 +4
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 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 6 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 is available in the Linux kernel commits identified by the provided fixedVersions hashes. Users should update their Linux kernel to a version containing these fixes to remediate the vulnerability.
Description
A vulnerability in the Linux kernel's evm subsystem was fixed by properly terminating and bounding the evm_xattrs read buffer. The flaw involved reading beyond initialized memory when no extended attributes were enabled, due to an uninitialized buffer and incorrect length calculation.
References
- git.kernel.org/stable/c/8df81954d22a653a8b01d46692cd56f71137269b (opens in a new tab)
- git.kernel.org/stable/c/0b9f8282b40af4a99d6243d2cb939d14ff36b049 (opens in a new tab)
- git.kernel.org/stable/c/a36cbfb85f26e6c6fb6529b1a364331b94dc88f3 (opens in a new tab)
- git.kernel.org/stable/c/12ad52dc45a0c8c9d25e85b4a84201de4c5420ed (opens in a new tab)
- git.kernel.org/stable/c/a0f64cf8bfcb39e533d9e27aeb763a8d81b7f39d (opens in a new tab)
- git.kernel.org/stable/c/38b7d63b23aa9d2ddde7688040e9426d32be4065 (opens in a new tab)
- git.kernel.org/stable/c/11143a19f5b8dc8f414deab87571134f9f447313 (opens in a new tab)