CVE-2026-80713 io_uring: preserve task restrictions across exec
Attackers can bypass io_uring task restrictions after exec, potentially escalating privileges by creating unrestricted rings.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80713?
CVE-2026-80713 is a high-severity vulnerability in Linux, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
io_uring: preserve task restrictions across exec
Per-task restrictions apply to all rings created by a task. Once installed, they should not be dropped across exec.
For a task that has used io_uring, the exec cancellation path calls __io_uring_free(). This frees both the task context and the per-task restriction, so a ring created after exec is unrestricted.
Split task context cleanup into io_uring_free_tctx(), and use it from the exec cancellation path. Keep __io_uring_free() for final task cleanup, where both the context and restriction are released.
Which versions are affected by CVE-2026-80713?
How do I fix CVE-2026-80713?
Apply the vendor's patch.
Is CVE-2026-80713 being exploited?
There is no known exploitation of CVE-2026-80713 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-80713, GHSA-jh6f-w2gp-43jq, UBUNTU-CVE-2026-80713.