CVE-2026-98163 Linux Kernel - Use-After-Free Race Condition in cgroup Task Iteration

Linux kernel contains a use-after-free vulnerability caused by iteration over dying tasks with zero reference count in cgroup task iteration, letting attackers cause race conditions leading to potential memory corruption, exploit requires concurrent task lifecycle events.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.10% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use-After-Free Race Condition in cgroup Task Iteration
Impact
Denial Of Service, Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
26 September 2026
Updated
15 October 2026
Weakness
CWE-362

Vendor fix

Update to the latest Linux kernel version containing the fix for commit 260fbcb92bbea or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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