CVE-2026-74331: Linux kernel · firmware_loader: Fix recursive lock in device_cache_fw_images()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f25d6e4ec4c257030592bd671f113cf9584c52f0 : 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 f25d6e4ec4c257030592bd671f113cf9584c52f0, d3ec78f8f8d48a04a9fac38d47275c34645e5103, c0f2dedd41fe14dbe076c1672214802fb42cd8c8 +5
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 as indicated by the listed fixed commit versions. Users and administrators should update to a kernel version that includes the fix identified by the provided commit hashes. No additional mitigation is required as the patch resolves the deadlock by adjusting lock handling in the firmware loader.
Description
A deadlock vulnerability was fixed in the Linux kernel's firmware loader component. The issue occurs due to recursive locking of fw_lock during system suspend or hibernation preparation when caching firmware images. This deadlock arises if asynchronous work scheduling fails and the work executes synchronously, causing the lock to be acquired twice by the same thread. The fix involves releasing the lock before iterating over devices to prevent recursive locking.
References
- git.kernel.org/stable/c/806cb8fabfde7f830da5ae87777d52fdf50c4774 (opens in a new tab)
- git.kernel.org/stable/c/7865a1bfd20d10c03b083a5fc392d907ca5099b3 (opens in a new tab)
- git.kernel.org/stable/c/490b0385e4cfac691f7b18dde821c13e77b4770b (opens in a new tab)
- git.kernel.org/stable/c/38149b57427c736c08d9aa4c7b87deacd53e9e63 (opens in a new tab)
- git.kernel.org/stable/c/a5b2a68a391b05d54552f13548a72a46c65006f7 (opens in a new tab)
- git.kernel.org/stable/c/f25d6e4ec4c257030592bd671f113cf9584c52f0 (opens in a new tab)
- git.kernel.org/stable/c/c0f2dedd41fe14dbe076c1672214802fb42cd8c8 (opens in a new tab)
- git.kernel.org/stable/c/d3ec78f8f8d48a04a9fac38d47275c34645e5103 (opens in a new tab)