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CVE-2026-89645VulnerabilityPublished Updated

Microsoft · btrfs: drop recovered reloc root refs on recovery failure

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-89645· Medium

Not known to be exploited · fixed in f671ffc678e0247aad77126670cb28c766d6ab3d : 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 f671ffc678e0247aad77126670cb28c766d6ab3d, 2256d6dc5b88841a8a8b4fd9a9f04730705fb6fd, 8a64baeb5bbb706b83d2235c1e39f5b77183817f +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 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
  • ≥ f44deb7442edf42abee6be25fca7e3e86061b4c9, < f671ffc678e0247aad77126670cb28c766d6ab3d
Fixed in
  • f671ffc678e0247aad77126670cb28c766d6ab3d
LinuxLinuxAffected
  • ≥ f44deb7442edf42abee6be25fca7e3e86061b4c9, < 2256d6dc5b88841a8a8b4fd9a9f04730705fb6fd
Fixed in
  • 2256d6dc5b88841a8a8b4fd9a9f04730705fb6fd
LinuxLinuxAffected
  • ≥ f44deb7442edf42abee6be25fca7e3e86061b4c9, < 8a64baeb5bbb706b83d2235c1e39f5b77183817f
Fixed in
  • 8a64baeb5bbb706b83d2235c1e39f5b77183817f
LinuxLinuxAffected
  • ≥ f44deb7442edf42abee6be25fca7e3e86061b4c9, < 7b8c6af17287899a5d00c70566831feac237d192
Fixed in
  • 7b8c6af17287899a5d00c70566831feac237d192
LinuxLinuxAffected
  • ≥ f44deb7442edf42abee6be25fca7e3e86061b4c9, < 6d8ba4572922e336f0b59a80751b018e1e135164
Fixed in
  • 6d8ba4572922e336f0b59a80751b018e1e135164
LinuxLinuxAffected
  • ≥ f44deb7442edf42abee6be25fca7e3e86061b4c9, < 4d43107e807bcd92621106b07f5011411c6341a8
Fixed in
  • 4d43107e807bcd92621106b07f5011411c6341a8

Description

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

References

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