Microsoft · btrfs: do not ASSERT() when the fs flips RO inside btrfs_repair_io_failure()
Affects MicrosoftSource GCVE Database
Not known to be exploited · fixed in f6df18c001e3dcebc08482d0adeacd0cfea08593 : patch Microsoft soon.
Data as of 30 Oct 2026, 06:59 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in f6df18c001e3dcebc08482d0adeacd0cfea08593, da3f596073de1c3cbc99941f01296968a85c8c76, a35b38cb4b0dd08d7cc0bd4e400208c7aeba8a72 +2
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 29 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
Description
CVE-2026-43299 is a vulnerability related to the btrfs filesystem where an assertion failure occurs when the filesystem flips to read-only mode inside the btrfs_repair_io_failure() function. The issue affects version 3.0 of the Microsoft product. No CVSS score or detailed impact information is provided, and no known exploits are reported. There is no information on available patches or vendor advisories regarding remediation.