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VulnerabilityPublished Updated

CVE-2025-38444: Linux kernel · raid10: cleanup memleak at raid10_make_request

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ed7bcd9f617e4107ac0813c516e72e6b8f6029bd : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:20 UTC

Severity
Low

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

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch
Available – fixed in ed7bcd9f617e4107ac0813c516e72e6b8f6029bd, 2941155d9a5ae098b480d551f3a5f8605d4f9af5, 43806c3d5b9bb7d74ba4e33a6a8a41ac988bde24 +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Jul 2025

  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 5 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=5.15.111 <5.15.189
Fixed in
  • ed7bcd9f617e4107ac0813c516e72e6b8f6029bd
  • 2941155d9a5ae098b480d551f3a5f8605d4f9af5
  • 43806c3d5b9bb7d74ba4e33a6a8a41ac988bde24
  • 10c6021a609deb95f23f0cc2f89aa9d4bffb14c7
  • 9af149ca9d0dab6e59e813519d309eff62499864
  • 8fc3d7b23d139e3cbc944c15d99b3cdbed797d2d
  • 5.15.189
LinuxLinuxAffected
  • =5.17
Fixed in–

AI-suggested

A fix for this memory leak vulnerability is available in Linux kernel version 5.15.189. Users and administrators should upgrade to this version or later to remediate the issue. No additional mitigation steps are indicated.

Description

CVE-2025-38444 is a memory leak vulnerability in the Linux kernel's RAID10 implementation. The issue occurs in the raid10_make_request function when raid10_read_request or raid10_write_request registers a new request with the REQ_NOWAIT flag set, causing allocated memory from the mempool not to be freed properly. This flaw has been fixed in Linux kernel version 5.15.189 and later.

References

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