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CVE-2026-31530VulnerabilityPublished Updated

Microsoft · cxl/port: Fix use after free of parent_port in cxl_detach_ep()

Affects MicrosoftSource GCVE Database

0
Authoritative record:CVE-2026-31530· High

Not known to be exploited · fixed in f7dc6f381a1e5f068333f1faa9265d6af1df4235 : patch Microsoft soon.

Data as of 27 Oct 2026, 00:11 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

Patch
Available – fixed in f7dc6f381a1e5f068333f1faa9265d6af1df4235, d216a4bd138eb57cc4ae7c43b2f709e3482af7e2, b1f62588ab1be6c9535d74348003c86b47ec4abd +2

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 2345df54249c6fb7779e2a72b427ee79ed3eaad5, < f7dc6f381a1e5f068333f1faa9265d6af1df4235
Fixed in
  • f7dc6f381a1e5f068333f1faa9265d6af1df4235
LinuxLinuxAffected
  • ≥ 2345df54249c6fb7779e2a72b427ee79ed3eaad5, < d216a4bd138eb57cc4ae7c43b2f709e3482af7e2
Fixed in
  • d216a4bd138eb57cc4ae7c43b2f709e3482af7e2
LinuxLinuxAffected
  • ≥ 2345df54249c6fb7779e2a72b427ee79ed3eaad5, < b1f62588ab1be6c9535d74348003c86b47ec4abd
Fixed in
  • b1f62588ab1be6c9535d74348003c86b47ec4abd
LinuxLinuxAffected
  • ≥ 2345df54249c6fb7779e2a72b427ee79ed3eaad5, < 19d2f0b97a131198efc2c4ca3eb7f980bba8c2b4
Fixed in
  • 19d2f0b97a131198efc2c4ca3eb7f980bba8c2b4
LinuxLinuxAffected
  • ≥ 2345df54249c6fb7779e2a72b427ee79ed3eaad5, < 2c32141462045cf93d54a5146a0ba572b83533dd
Fixed in
  • 2c32141462045cf93d54a5146a0ba572b83533dd
LinuxLinuxAffected
  • =6.3
Fixed in–

Description

CVE-2026-31530 is a vulnerability in Microsoft software involving a use-after-free flaw in the cxl/port component, specifically in the cxl_detach_ep() function related to the parent_port object. This flaw could lead to memory corruption or instability if exploited. The vulnerability affects version 3.0 of the product. No CVSS score or detailed impact information is provided, and there is no indication of known exploitation in the wild.

References

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