CVE-2026-68312: Linux kernel · cifs: fix cifsFileInfo leak on kmalloc failure in deferred close drain paths
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in c968b2417f6a15d35ff4b97d534af4a126cb510b : update Linux kernel when convenient.
Data as of 26 Oct 2026, 21:23 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in c968b2417f6a15d35ff4b97d534af4a126cb510b, c2f2e83e3bbc5483730fd4ee903182761f1ae50f, 32390b3f06f26e366cfb27dbac4bc0196c321535 +2
Exploitation evidence
Disclosed: evidence found.
CVE published 10 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 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– |
AI-suggested
A fix is available in the Linux kernel as indicated by the fixed commit versions. Users should update to a kernel version that includes the fix identified by the commits c968b2417f6a15d35ff4b97d534af4a126cb510b, c2f2e83e3bbc5483730fd4ee903182761f1ae50f, 32390b3f06f26e366cfb27dbac4bc0196c321535, 6089f561e2c31a3ba52836c75c7d2ab50d2eea41, and 7af7ec3af091f55d01f0ebe0246d10e37f358311. No additional mitigation is required beyond applying the official fix.
Description
A memory leak vulnerability in the Linux kernel's CIFS client was fixed. The issue occurs when deferred close operations fail to allocate memory, causing a cifsFileInfo reference and open server handle to leak. This happens in specific deferred close drain paths when canceling pending deferred close work under memory pressure. The fix ensures proper release of the leaked references after allocation failure.
References
- git.kernel.org/stable/c/c968b2417f6a15d35ff4b97d534af4a126cb510b (opens in a new tab)
- git.kernel.org/stable/c/7af7ec3af091f55d01f0ebe0246d10e37f358311 (opens in a new tab)
- git.kernel.org/stable/c/6089f561e2c31a3ba52836c75c7d2ab50d2eea41 (opens in a new tab)
- git.kernel.org/stable/c/32390b3f06f26e366cfb27dbac4bc0196c321535 (opens in a new tab)
- git.kernel.org/stable/c/c2f2e83e3bbc5483730fd4ee903182761f1ae50f (opens in a new tab)