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VulnerabilityPublished Updated

CVE-2024-42241: Linux kernel · mm/shmem: disable PMD-sized page cache if needed

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 15:19 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 Aug 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 is available that disables PMD-sized page cache when the huge page order exceeds the maximum supported page cache order. Users should update to a Linux kernel version that includes this fix. No additional mitigation steps are indicated.

Description

CVE-2024-42241 is a vulnerability in the Linux kernel's memory management subsystem related to shmem files and PMD-sized page cache. On certain architectures like ARM64 with large base page sizes, the PMD-sized page cache cannot be supported by the xarray data structure, leading to kernel warnings and potential errors. The issue arises when xarray entries are split, causing instability. The fix involves disabling PMD-sized page cache when the huge page order exceeds the maximum supported page cache order.

References

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