CVE-2025-38323: Linux kernel · net: atm: add lec_mutex
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f4d80b16ecc4229f7e6345158ef34c36be323f0e : patch Linux kernel soon.
Data as of 5 Nov 2026, 21:33 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
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, 2026-11-05.
- Patch
- Available – fixed in f4d80b16ecc4229f7e6345158ef34c36be323f0e, e91274cc7ed88ab5bdc62d426067c82b0b118a0b, dffd03422ae6a459039c8602f410e6c0f4cbc6c8 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 10 Jul 2025
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 5 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 and has been applied in multiple Linux kernel commits. Users and administrators should update to a Linux kernel version that includes the patches referenced by the fixed commit hashes. No additional mitigation steps are indicated beyond applying the official fix.
Description
A use-after-free vulnerability was identified in the Linux kernel's net/atm/lec.c component related to the lecd_attach() function. The issue involves a dangling pointer in dev_lec[] due to missing synchronization, which was fixed by adding a mutex (lec_mutex) to protect access in lecd_attach(), lec_vcc_attach(), and lec_mcast_attach(). The flaw was detected by syzbot and triggered kernel address sanitizer (KASAN) errors indicating slab-use-after-free conditions. The vulnerability affects Linux kernel version 2.6.12 and has been fixed in subsequent commits.
References
- git.kernel.org/stable/c/e91274cc7ed88ab5bdc62d426067c82b0b118a0b (opens in a new tab)
- git.kernel.org/stable/c/a7a713dfb5f9477345450f27c7c0741864511192 (opens in a new tab)
- git.kernel.org/stable/c/17e156a94e94a906a570dbf9b48877956c60bef8 (opens in a new tab)
- git.kernel.org/stable/c/18e8f0c4f826fb08c2d3825cdd6c57e24b207e0a (opens in a new tab)
- git.kernel.org/stable/c/dffd03422ae6a459039c8602f410e6c0f4cbc6c8 (opens in a new tab)
- git.kernel.org/stable/c/f4d80b16ecc4229f7e6345158ef34c36be323f0e (opens in a new tab)
- git.kernel.org/stable/c/64b378db28a967f7b271b055380c2360279aa424 (opens in a new tab)
- git.kernel.org/stable/c/d13a3824bfd2b4774b671a75cf766a16637a0e67 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)