CVE-2026-99086: Linux kernel · dm-integrity: validate the superblock on resume
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in fc79aeb86a2c244c1f1894e2d8f2966fe2b60fa2 : patch Linux kernel soon.
Data as of 26 Oct 2026, 14:18 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in fc79aeb86a2c244c1f1894e2d8f2966fe2b60fa2, e9ec5cbbaf4dd3a02ae3d81719f4fcb9b609aa8e, 454b67fcc28c18502e47dfb9f067b04c28628ada +5
Exploitation evidence
Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 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– |
AI-suggested
A fix is available in Linux kernel versions 6.2, 6.7, 6.13, 6.18.58, 6.20, and later. Users should upgrade to these fixed versions or later to mitigate this vulnerability. No additional mitigation steps are indicated beyond applying the official patch.
Description
A vulnerability in the Linux kernel's dm-integrity module allows a mismatch between the superblock on resume and the validated superblock stored in memory. This can lead to out-of-bounds memory writes when the superblock is modified while the device is suspended. The issue is fixed by snapshotting the validated superblock and refusing to resume if on-disk geometry fields have changed.