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CVE-2026-98951VulnerabilityPublished Updated

Microsoft · riscv: ptrace: Zero-initialize regset buffers before copyin

Affects MicrosoftSource GCVE Database

0
Authoritative record:CVE-2026-98951· Medium

Not known to be exploited · fixed in 59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97 : update Microsoft when convenient.

Data as of 28 Oct 2026, 08:45 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Patch
Available – fixed in 59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97, 89fc70d73f4ac8781f9e15edd1dbc6b6088453b3, 6.6

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Upgrade Linux to 59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97, 89fc70d73f4ac8781f9e15edd1dbc6b6088453b3 or 6.6.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=6.5.3 <6.6
Fixed in
  • 59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97
  • 89fc70d73f4ac8781f9e15edd1dbc6b6088453b3
  • 6.6
LinuxLinuxAffected
  • =6.6
Fixed in–

Description

A vulnerability identified as CVE-2026-98951 affects Microsoft products version 3.0 and 4.0. It involves the riscv ptrace functionality where regset buffers are not zero-initialized before copyin. No detailed impact or exploitation information is provided.

References

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