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CVE-2026-46171VulnerabilityPublished Updated

Microsoft · riscv: kvm: fix vector context allocation leak

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-46171· Low

Not known to be exploited · fixed in bd62c0f61bc722a097417401030c596cea8e21aa : update Microsoft when convenient.

Data as of 30 Oct 2026, 06:59 UTC

Severity
Low

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.
Patch
Available – fixed in bd62c0f61bc722a097417401030c596cea8e21aa, b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978, 70ecebe7c58ce01f8da3f513eafb51bd147b1e63 +2

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 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

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 0f4b82579716b12bb88257bd7ea80f25c791fb2c, < bd62c0f61bc722a097417401030c596cea8e21aa
Fixed in
  • bd62c0f61bc722a097417401030c596cea8e21aa
LinuxLinuxAffected
  • ≥ 0f4b82579716b12bb88257bd7ea80f25c791fb2c, < b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978
Fixed in
  • b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978
LinuxLinuxAffected
  • ≥ 0f4b82579716b12bb88257bd7ea80f25c791fb2c, < 70ecebe7c58ce01f8da3f513eafb51bd147b1e63
Fixed in
  • 70ecebe7c58ce01f8da3f513eafb51bd147b1e63
LinuxLinuxAffected
  • ≥ 0f4b82579716b12bb88257bd7ea80f25c791fb2c, < 8f3a5dc4055e1001b44ca8ae2bd3eb1d07782049
Fixed in
  • 8f3a5dc4055e1001b44ca8ae2bd3eb1d07782049
LinuxLinuxAffected
  • ≥ 0f4b82579716b12bb88257bd7ea80f25c791fb2c, < 1d57ab45ec5c0e22789de793bcf2a31ad6fb7d98
Fixed in
  • 1d57ab45ec5c0e22789de793bcf2a31ad6fb7d98
LinuxLinuxAffected
  • =6.5
Fixed in–

Description

CVE-2026-46171 is a vulnerability in Microsoft software related to the RISC-V KVM (Kernel-based Virtual Machine) component, specifically addressing a vector context allocation leak. The affected version is 3.0. No CVSS score is provided, and there are no known exploits in the wild.

References

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