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CVE-2026-99063VulnerabilityPublished Updated

Microsoft · dm ioctl: don't let data_start run past the buffer

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99063· Low

Not known to be exploited · fixed in f171054f3c4cfc4dc0cb622ec5b15793e5f23029 : update Microsoft when convenient.

Data as of 7 Nov 2026, 12:18 UTC

Severity
Low

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in f171054f3c4cfc4dc0cb622ec5b15793e5f23029, e5c3f3d8935ecc64c962fb66e6a86dbf79218f61, afe80ec31464f4c54cc1bc658753bc14cb14bd6c +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Oct 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
  • ≥ 76c072b48e39e9291fbf02d6c912cf27d65e093d, < f171054f3c4cfc4dc0cb622ec5b15793e5f23029
Fixed in
  • f171054f3c4cfc4dc0cb622ec5b15793e5f23029
LinuxLinuxAffected
  • ≥ 76c072b48e39e9291fbf02d6c912cf27d65e093d, < e5c3f3d8935ecc64c962fb66e6a86dbf79218f61
Fixed in
  • e5c3f3d8935ecc64c962fb66e6a86dbf79218f61
LinuxLinuxAffected
  • ≥ 76c072b48e39e9291fbf02d6c912cf27d65e093d, < afe80ec31464f4c54cc1bc658753bc14cb14bd6c
Fixed in
  • afe80ec31464f4c54cc1bc658753bc14cb14bd6c
LinuxLinuxAffected
  • ≥ 76c072b48e39e9291fbf02d6c912cf27d65e093d, < aaa93e41ae308ad9ff9d9ba3296a0d0f4d45bad3
Fixed in
  • aaa93e41ae308ad9ff9d9ba3296a0d0f4d45bad3
LinuxLinuxAffected
  • ≥ 76c072b48e39e9291fbf02d6c912cf27d65e093d, < 98195e822343a656b92e235847ab3e72b1a3f920
Fixed in
  • 98195e822343a656b92e235847ab3e72b1a3f920
LinuxLinuxAffected
  • ≥ 76c072b48e39e9291fbf02d6c912cf27d65e093d, < 5680b6fb3054677d4ee65d3baba24b649f1b430e
Fixed in
  • 5680b6fb3054677d4ee65d3baba24b649f1b430e

Description

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

References

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