SB2024071329 - Use-after-free in Linux kernel io_uring
Published: July 13, 2024 Updated: May 13, 2025
Security Bulletin ID
SB2024071329
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2024-39508)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the WORKER_IDLE_TIMEOUT(), io_work_get_acct(), io_worker_exit(), io_wq_dec_running(), __io_worker_busy(), io_wq_worker(), io_wq_worker_running(), io_wq_worker_sleeping(), io_init_new_worker(), init_completion() and io_wq_work_match_item() functions in io_uring/io-wq.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0
- https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf
- https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.35