Microsoft · ext4: free the sbi after a grace period
Affects MicrosoftSource GCVE Database
Not known to be exploited · fixed in c17b44266a1f9fcb49b894d4611d1254bf1aa313 : patch Microsoft soon.
Data as of 29 Oct 2026, 11:35 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in c17b44266a1f9fcb49b894d4611d1254bf1aa313, 87d29b8b849738d52fe820d495fa0aa2d5a1ec82, 80d5db1686b05fad6f384be017714297d828a714
Exploitation evidence
Disclosed: evidence found.
CVE published 28 Oct 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 Linux to c17b44266a1f9fcb49b894d4611d1254bf1aa313, 87d29b8b849738d52fe820d495fa0aa2d5a1ec82 or 80d5db1686b05fad6f384be017714297d828a714.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
Red Hatredhat/kernelpkg:rpm/redhat/kernelOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
CVE-2026-99174 is a vulnerability related to the ext4 filesystem, specifically involving the freeing of the sbi (superblock info) after a grace period. The information provided is minimal and does not describe the nature of the flaw, its impact, or exploitation details.