Microsoft · btrfs: reserve enough transaction items for qgroup ioctls
Affects MicrosoftSource GCVE Database
Not known to be exploited · fixed in f9a4e3015db1aeafbef407650eb8555445ca943e : update Microsoft when convenient.
Data as of 30 Oct 2026, 11:52 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- 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 f9a4e3015db1aeafbef407650eb8555445ca943e, cf930a651eef6f8d915bf0ccd60c2045974f870c, bb6eb33c908edbbb4d92abdc0c6c87f21b4952e8 +3
Exploitation evidence
Disclosed: evidence found.
CVE published 8 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 30 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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Description
CVE-2026-43338 is a vulnerability related to the btrfs filesystem component in Microsoft software version 3.0. The issue involves reserving enough transaction items for qgroup ioctls. No detailed technical information or CVSS score is provided.