CVE-2024-53178: Linux kernel · Memory Leak
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.5 High.
Data as of 30 Oct 2026, 14:32 UTC
Contested
Scorers differ by 2 or more points| CNA (Linux) | CVSS 3.1 | 7.5 |
|---|---|---|
| CISA-ADP | CVSS 3.1 | 4.7 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 27 Dec 2024
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 30 Oct 2026.
What to do
AI-suggested
A fix has been implemented in the Linux kernel to address this issue by correcting reference counting and lease management in the SMB client code. Users should update to a Linux kernel version that includes this fix. No additional mitigation steps are indicated.
Description
CVE-2024-53178 is a high-severity vulnerability in the Linux kernel's SMB client implementation. It involves a reference count leak (cfid leak) caused by a race condition during SMB connection reconnection and directory caching operations. This flaw can lead to memory leaks and system instability, including BUG splats during SMB filesystem unmounts. The issue has been fixed by properly managing reference counts and lease flags on cached directory objects.
References
- git.kernel.org/stable/c/c8bf625e188593232d515fb50e240305b6ae14dd (opens in a new tab)
- git.kernel.org/stable/c/31fabf70d58388d5475e48ca8a6b7d2847b36678 (opens in a new tab)
- git.kernel.org/stable/c/1d76332d783db12684b67592f1fb2057b88af4c3 (opens in a new tab)
- git.kernel.org/stable/c/73a57b25b4df23f22814fc06b7e8f9cf570be026 (opens in a new tab)
- git.kernel.org/stable/c/7afb86733685c64c604d32faf00fa4a1f22c2ab1 (opens in a new tab)