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CVE-2026-99037VulnerabilityPublished Updated

Microsoft · dm-crypt: reject the lmk IV mode with AEAD ciphers

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99037· Low

Not known to be exploited · fixed in a04546fa65cbcf4a2774f93f365d747a19abb9b8 : update Microsoft when convenient.

Data as of 7 Nov 2026, 12:36 UTC

Severity
Low

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in a04546fa65cbcf4a2774f93f365d747a19abb9b8, a50e830ded5a0d0cb9e897d1521716ba654f8c3e, a1a875614dae43b43d311bb9e7a7a70eed78efe6 +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
  • ≥ 33d2f09fcb357fd1861c4959d1d3505492bf91f8, < a04546fa65cbcf4a2774f93f365d747a19abb9b8
Fixed in
  • a04546fa65cbcf4a2774f93f365d747a19abb9b8
LinuxLinuxAffected
  • ≥ 33d2f09fcb357fd1861c4959d1d3505492bf91f8, < a50e830ded5a0d0cb9e897d1521716ba654f8c3e
Fixed in
  • a50e830ded5a0d0cb9e897d1521716ba654f8c3e
LinuxLinuxAffected
  • ≥ 33d2f09fcb357fd1861c4959d1d3505492bf91f8, < a1a875614dae43b43d311bb9e7a7a70eed78efe6
Fixed in
  • a1a875614dae43b43d311bb9e7a7a70eed78efe6
LinuxLinuxAffected
  • ≥ 33d2f09fcb357fd1861c4959d1d3505492bf91f8, < 3195e0daf590683992edb4eed32269e569e04924
Fixed in
  • 3195e0daf590683992edb4eed32269e569e04924
LinuxLinuxAffected
  • ≥ 33d2f09fcb357fd1861c4959d1d3505492bf91f8, < 962ce265fbf5d87afeb78cf19c12e083ab0ffeb8
Fixed in
  • 962ce265fbf5d87afeb78cf19c12e083ab0ffeb8
LinuxLinuxAffected
  • ≥ 33d2f09fcb357fd1861c4959d1d3505492bf91f8, < 412d1c1f490ed9ec5bd029883e8a626626613a70
Fixed in
  • 412d1c1f490ed9ec5bd029883e8a626626613a70

Description

This vulnerability concerns dm-crypt rejecting the lmk IV mode when used with AEAD ciphers. The provided information is limited and does not detail the impact or exploitation methods. The affected versions are 3.0 and 4.0 of the Microsoft product referenced. No CVSS score or detailed impact description is available.

References

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