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CVE-2026-97587VulnerabilityPublished Updated

Microsoft · perf: RISC-V: store available counter mask as bitmap

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-97587· Medium

Not known to be exploited · fixed in e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb : 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 e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb, 433249a4de52ecda40ffa9c466cec1312e62826f, 143668c424772979a45118dc9cc9c2c13a35f41d +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 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
  • ≥ e9991434596f5373dfd75857b445eb92a9253c56, < e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb
Fixed in
  • e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb
LinuxLinuxAffected
  • ≥ e9991434596f5373dfd75857b445eb92a9253c56, < 433249a4de52ecda40ffa9c466cec1312e62826f
Fixed in
  • 433249a4de52ecda40ffa9c466cec1312e62826f
LinuxLinuxAffected
  • ≥ e9991434596f5373dfd75857b445eb92a9253c56, < 143668c424772979a45118dc9cc9c2c13a35f41d
Fixed in
  • 143668c424772979a45118dc9cc9c2c13a35f41d
LinuxLinuxAffected
  • ≥ e9991434596f5373dfd75857b445eb92a9253c56, < 6809da6e9c08ccc9a09cb0a48c61471679274aaa
Fixed in
  • 6809da6e9c08ccc9a09cb0a48c61471679274aaa
LinuxLinuxAffected
  • ≥ e9991434596f5373dfd75857b445eb92a9253c56, < 9bec7beaed074bcae4181fde9ff9dfbe4e7b0957
Fixed in
  • 9bec7beaed074bcae4181fde9ff9dfbe4e7b0957
LinuxLinuxAffected
  • ≥ e9991434596f5373dfd75857b445eb92a9253c56, < 5a1b6379eed5b13eac0228b605b0bed988e547e9
Fixed in
  • 5a1b6379eed5b13eac0228b605b0bed988e547e9

Description

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

References

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