SB20251226259 - Improper locking in Linux kernel io_uring
Published: December 26, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251226259
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2022-50705)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the kiocb_end_write(), io_fixup_rw_res() and io_complete_rw() functions in io_uring/rw.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2a853c206e553dd9c0a55c22858fd6a446d93e15
- https://git.kernel.org/stable/c/89a410dbd0f159ddd308f19d6eb682fc753e4771
- https://git.kernel.org/stable/c/b000145e9907809406d8164c3b2b8861d95aecd1
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.165
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.90
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1