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VulnerabilityPublished Updated

CVE-2025-71186: Linux kernel · dmaengine: stm32: dmamux: fix device leak on route allocation

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in dd6e4943889fb354efa3f700e42739da9bddb6ef : update Linux kernel when convenient.

Data as of 10 Nov 2026, 13:03 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
Patch
Available – fixed in dd6e4943889fb354efa3f700e42739da9bddb6ef, 6393da54dcb3488c080a183c4182ddec71ba8d7f, 3ef52d31cce8ba816739085a61efe07b63c6cf27 +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Jan 2026

  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 10 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ df7e762db5f6c8dbd9e480f1c9ef9851de346657, < dd6e4943889fb354efa3f700e42739da9bddb6ef
Fixed in
  • dd6e4943889fb354efa3f700e42739da9bddb6ef
LinuxLinuxAffected
  • ≥ df7e762db5f6c8dbd9e480f1c9ef9851de346657, < 6393da54dcb3488c080a183c4182ddec71ba8d7f
Fixed in
  • 6393da54dcb3488c080a183c4182ddec71ba8d7f
LinuxLinuxAffected
  • ≥ df7e762db5f6c8dbd9e480f1c9ef9851de346657, < 3ef52d31cce8ba816739085a61efe07b63c6cf27
Fixed in
  • 3ef52d31cce8ba816739085a61efe07b63c6cf27
LinuxLinuxAffected
  • ≥ df7e762db5f6c8dbd9e480f1c9ef9851de346657, < 3b42020e6790a5e19b36c187ed5b488a5716f97f
Fixed in
  • 3b42020e6790a5e19b36c187ed5b488a5716f97f
LinuxLinuxAffected
  • ≥ df7e762db5f6c8dbd9e480f1c9ef9851de346657, < 2fb10259d4efb4367787b5ae9c94192e8a91c648
Fixed in
  • 2fb10259d4efb4367787b5ae9c94192e8a91c648
LinuxLinuxAffected
  • ≥ df7e762db5f6c8dbd9e480f1c9ef9851de346657, < 1dda2a32303df0091896b01a9d09070d61fa344c
Fixed in
  • 1dda2a32303df0091896b01a9d09070d61fa344c

AI-suggested

The vulnerability has been fixed in multiple Linux kernel commits as listed in the established facts. Users should update their Linux kernel to a version that includes these fixes to remediate the issue. No additional mitigation steps are required beyond applying the official patch.

Description

A vulnerability in the Linux kernel's dmaengine subsystem for STM32 devices involving the DMA multiplexer (dmamux) has been fixed. The issue was a device reference leak during route allocation, where references taken when looking up the DMA mux platform device were not properly dropped. This could lead to resource leaks but does not prevent driver data from being freed.

References

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