SB20260325161 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Linux kernel unix

Description

This security bulletin contains information about 1 vulnerability.

1) Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (CVE-ID: CVE-2026-23302)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a race condition in socket state handling when processing network operations. A local user can trigger concurrent access to socket state variables to cause a denial of service.

The issue arises from improper synchronization of sk->sk_data_ready and sk->sk_write_space pointers during concurrent access by multiple CPUs.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/27fccdbcbbfc4651b6f66756e6fa3f52e051ec23
• https://git.kernel.org/stable/c/2ef2b20cf4e04ac8a6ba68493f8780776ff84300
• https://git.kernel.org/stable/c/f17c1c4acbe2bd702abce73a847a04a196fab2c5