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VulnerabilityPublished Updated

CVE-2024-53178: Linux kernel · Memory Leak

Affects Linux kernelSource GCVE Database

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Not known to be exploited · CVSS 7.5 High.

Data as of 30 Oct 2026, 14:32 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Contested

Scorers differ by 2 or more points
CVSS scores by source
CNA (Linux)CVSS 3.17.5
CISA-ADPCVSS 3.14.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Dec 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

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