CVE-2026-98972: Linux kernel · cgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode()
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469 or 988bf67a13890a37a33201f95947095ca9bec856 soon.
Data as of 26 Oct 2026, 13:07 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 e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469, 988bf67a13890a37a33201f95947095ca9bec856
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 Linux kernel to e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469 or 988bf67a13890a37a33201f95947095ca9bec856.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
This vulnerability has been fixed in the Linux kernel versions identified by commits e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469 and 988bf67a13890a37a33201f95947095ca9bec856. Users should update to these fixed versions or later to mitigate the issue. No additional mitigations are indicated.
Description
A use-after-free vulnerability in the Linux kernel's cgroup cpuset subsystem was addressed by avoiding direct access to a potentially stale pointer in the is_in_v2_mode() function. The fix introduces a new flag to safely indicate cpuset v2 mode, preventing unsafe memory access during cgroup filesystem rebind operations.