CVE-2026-81010 Linux Kernel io_uring - Denial of Service

Linux kernel io_uring contains a task_work cancellation handling flaw in io_waitid_cb(), causing incorrect child process wait behavior when fallback task_work runs from kworker, letting attackers cause denial of service by request cancellation.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.18% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for io_uring task_work cancellation handling.

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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