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CVE-2026-80864VulnerabilityPublished Updated

Microsoft · RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-80864· Medium

Not known to be exploited · fixed in ffa4f0be69656be1755090f02db38d49816585c6 : update Microsoft when convenient.

Data as of 7 Nov 2026, 12:19 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in ffa4f0be69656be1755090f02db38d49816585c6, d4cd32eb8bd2b0ffbdc7b1f3d82ce6a371f8f844, 82257379061c0a7aba6c77081d988339982af115 +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Sep 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 7 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < ffa4f0be69656be1755090f02db38d49816585c6
Fixed in
  • ffa4f0be69656be1755090f02db38d49816585c6
LinuxLinuxAffected
  • ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < d4cd32eb8bd2b0ffbdc7b1f3d82ce6a371f8f844
Fixed in
  • d4cd32eb8bd2b0ffbdc7b1f3d82ce6a371f8f844
LinuxLinuxAffected
  • ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < 82257379061c0a7aba6c77081d988339982af115
Fixed in
  • 82257379061c0a7aba6c77081d988339982af115
LinuxLinuxAffected
  • ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < 0136b528b753c5a56e4d997ef20b86bb6750b8fb
Fixed in
  • 0136b528b753c5a56e4d997ef20b86bb6750b8fb
LinuxLinuxAffected
  • ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < 87e40635d77aa19088550698c81eb295d5131f71
Fixed in
  • 87e40635d77aa19088550698c81eb295d5131f71
LinuxLinuxAffected
  • ≥ 8700e3e7c4857d28ebaa824509934556da0b3e76, < 60dfd47929cd1e7070daa810d40ce538d888410d
Fixed in
  • 60dfd47929cd1e7070daa810d40ce538d888410d

Description

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

References

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