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CVE-2026-45973VulnerabilityPublished Updated

LAG error state unload · RDMA/mlx5: Fix UMR hang

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-45973· Medium

Not known to be exploited · fixed in ebc2164a4cd4314503f1a0c8e7aaf76d7e5fa211 : update Microsoft when convenient.

Data as of 30 Oct 2026, 11:52 UTC

Severity
Medium

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

Thin evidence

One scorer or none
EPSS
0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in ebc2164a4cd4314503f1a0c8e7aaf76d7e5fa211, c8fb5c965ac7d0104872a8e4f6451f3bc6328199, 613f5d4139b6ba801ccd93f9a28943be60d903bc +6

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 May 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 30 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=6.6.64 <6.6.160
  • >=6.12.2 <6.12.75
  • >=6.1.191 <6.2
  • >=6.11.11 <6.12
Fixed in
  • ebc2164a4cd4314503f1a0c8e7aaf76d7e5fa211
  • c8fb5c965ac7d0104872a8e4f6451f3bc6328199
  • 613f5d4139b6ba801ccd93f9a28943be60d903bc
  • 33deba9bf5c34335182342588315f3db7dbc56d3
  • 6d838873da9cb97551d42316967cc82bf8f8031b
  • 6.12.75
  • 6.12
  • 6.6.160
  • 6.2
LinuxLinuxAffected
  • =6.13
Fixed in–

Description

CVE-2026-45973 addresses a vulnerability related to RDMA/mlx5 where a UMR hang occurs during a LAG error state unload. The information provided is limited and does not include technical details or exploitation methods. There is no CVSS score or known exploits in the wild. The affected products include Microsoft and Azure Linux versions 3.0.

References

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