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CVE-2026-43309VulnerabilityPublished Updated

Microsoft · md raid: fix hang when stopping arrays with metadata through dm-raid

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-43309· Medium

Not known to be exploited · fixed in cefcb9297fbdb6d94b61787b4f8d84f55b741470 : update Microsoft when convenient.

Data as of 30 Oct 2026, 06:59 UTC

Severity
Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in cefcb9297fbdb6d94b61787b4f8d84f55b741470, 63054027d95200b04f3cf624faa7817e0555d56a, 338378dfffbdbb8d37a18f0a0c0358812671f91e +7

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 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
  • >=4.14.292 <4.15
  • >=4.19.257 <4.20
  • >=5.4.212 <5.5
  • >=5.10.140 <5.11
  • >=5.15.64 <5.16
  • >=5.19.6 <5.20
Fixed in
  • cefcb9297fbdb6d94b61787b4f8d84f55b741470
  • 63054027d95200b04f3cf624faa7817e0555d56a
  • 338378dfffbdbb8d37a18f0a0c0358812671f91e
  • 24783dd06de870d646c25207bae186f78195f912
  • 5.20
  • 5.16
  • 5.11
  • 5.5
  • 4.20
  • 4.15
LinuxLinuxAffected
  • =6.0
Fixed in–

Description

CVE-2026-43309 is a vulnerability related to md raid in Microsoft software, specifically causing a hang when stopping arrays with metadata through dm-raid. The affected version is exactly 3.0. No CVSS score is provided for this vulnerability.

References

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