CVE-2026-80713io_uring: preserve task restrictions across exec

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.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/fcef9325afeecced693a7438e975e4a3f8e2716f
• https://git.kernel.org/stable/c/bc0e8faf90e776a2f1f3967a04e8091e6bdb4977