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CVE-2026-46131VulnerabilityPublished Updated

slow flush hypercalls · KVM: x86: check for nEPT/nNPT

Affects MicrosoftSource GCVE Database

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Not known to be exploited.

Data as of 29 Oct 2026, 19:04 UTC

Severity
Medium

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

EPSS
0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 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 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Microsoft Security Response Center MicrosoftAffected
  • =3.0
  • Microsoft
  • Azure Linux
  • 3.0
  • Azure Linux 3.0
  • kernel
Fixed in–

Description

CVE-2026-46131 is a vulnerability related to KVM on x86 architectures involving checks for nEPT/nNPT in slow flush hypercalls. The information provided is minimal and does not include detailed technical specifics or impact metrics. No CVSS score is available, and no known exploits in the wild have been reported. The affected version explicitly stated is version 3.0 of the Microsoft product involved.

References

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