CVE-2026-98117: Linux kernel · cachefiles: Fix potential UAF/KASAN warning
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in a67632c8c2688d6e0091529bcefe54bc5ee80e9b : update Linux kernel when convenient.
Data as of 26 Oct 2026, 12:55 UTC
Rated Medium 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 a67632c8c2688d6e0091529bcefe54bc5ee80e9b, 93488ea378b4427598cace558236c110515d743b, 68d459e6e609c31f96a203dd6eec60c634f155e1
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 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 Linux kernel to a67632c8c2688d6e0091529bcefe54bc5ee80e9b, 93488ea378b4427598cace558236c110515d743b or 68d459e6e609c31f96a203dd6eec60c634f155e1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
The vulnerability has been fixed in specific Linux kernel commits (a67632c8c2688d6e0091529bcefe54bc5ee80e9b, 93488ea378b4427598cace558236c110515d743b, 68d459e6e609c31f96a203dd6eec60c634f155e1). Users should update to these fixed versions or later to remediate the issue.
Description
A use-after-free (UAF) or Kernel Address Sanitizer (KASAN) warning was identified and fixed in the Linux kernel's cachefiles subsystem. The issue involved improper handling of variable-length coherency data, potentially causing unsafe memory access. The fix ensures the buffer has at least 8 bytes pre-cleared and adjusts data extraction to avoid alignment issues.