CVE-2024-42241: Linux kernel · mm/shmem: disable PMD-sized page cache if needed
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 15:19 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 7 Aug 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 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
- git.kernel.org/stable/c/e991bfc6b69e3db6bdefde34f5d5c9686a192e8f (opens in a new tab)
- git.kernel.org/stable/c/93893eacb372b0a4a30f7de6609b08c3ba6c4fd9 (opens in a new tab)
- git.kernel.org/stable/c/cd25208ca9b0097f8e079d692fc678f36fdbc3f9 (opens in a new tab)
- git.kernel.org/stable/c/9fd154ba926b34c833b7bfc4c14ee2e931b3d743 (opens in a new tab)