Improper access control in Linux kernel - CVE-2026-80713
Published: August 28, 2026
Vulnerability identifier: #VU146087
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80713
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to bypass io_uring restrictions.
The vulnerability exists due to improper access control in the io_uring task restriction handling when a process performs an exec after previously using io_uring. A local user can execute a program and create a new io_uring ring after exec to bypass io_uring restrictions.
The issue occurs because the exec cancellation path releases the per-task restriction while preserving the ability to create a ring afterward.
Affected software
Linux kernel
How to mitigate CVE-2026-80713
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3