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CVE-2026-43118VulnerabilityPublished Updated

Microsoft · btrfs: fix zero size inode with non-zero size after log replay

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-43118· Medium

Not known to be exploited · fixed in fddb157536e67a055597f00a8b4922d5f5ed0826 : 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 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in fddb157536e67a055597f00a8b4922d5f5ed0826, c939bfa67d221f75351a5bf2fc912e8125547b7e, 91990732ec4ce5c09361d498c6d621f5a76ee1f2 +2

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 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
  • ≥ 12fcfd22fe5bf4fe74710232098bc101af497995, < fddb157536e67a055597f00a8b4922d5f5ed0826
Fixed in
  • fddb157536e67a055597f00a8b4922d5f5ed0826
LinuxLinuxAffected
  • ≥ 12fcfd22fe5bf4fe74710232098bc101af497995, < c939bfa67d221f75351a5bf2fc912e8125547b7e
Fixed in
  • c939bfa67d221f75351a5bf2fc912e8125547b7e
LinuxLinuxAffected
  • ≥ 12fcfd22fe5bf4fe74710232098bc101af497995, < 91990732ec4ce5c09361d498c6d621f5a76ee1f2
Fixed in
  • 91990732ec4ce5c09361d498c6d621f5a76ee1f2
LinuxLinuxAffected
  • ≥ 12fcfd22fe5bf4fe74710232098bc101af497995, < 5254d4181add9dfaa5e3519edd71cc8f752b2f85
Fixed in
  • 5254d4181add9dfaa5e3519edd71cc8f752b2f85
LinuxLinuxAffected
  • ≥ 12fcfd22fe5bf4fe74710232098bc101af497995, < 03e966b63df5b06790310c1faaf3e0cb43adea8b
Fixed in
  • 03e966b63df5b06790310c1faaf3e0cb43adea8b
LinuxLinuxAffected
  • =2.6.30
Fixed in–

Description

CVE-2026-43118 is a vulnerability related to the btrfs filesystem where an inode can have a zero size but a non-zero size after log replay. This issue affects version 3.0 of the Microsoft product referenced. No CVSS score or detailed impact information is provided.

References

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