SB2025090501 - Improper locking in Linux kernel io_uring
Published: September 5, 2025
Security Bulletin ID
SB2025090501
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-2025-38730)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the io_bundle_nbufs(), io_sendmsg(), io_net_kbuf_recyle(), io_send_zc() and io_sendmsg_zc() functions in io_uring/net.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/21a4ddb0f5e933f372808c10b9ac704505751bb1
- https://git.kernel.org/stable/c/2eb7937b5fc7fcd90eab7bebb0181214b61b9283
- https://git.kernel.org/stable/c/3b53dc1c641f2884d4750fc25aaf6c36b90db606
- https://git.kernel.org/stable/c/41b70df5b38bc80967d2e0ed55cc3c3896bba781
- https://git.kernel.org/stable/c/fe9da1812f8697a38f7e30991d568ec199e16059