SB20260928285 - Race condition in Linux kernel time

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-97925)

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

CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

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

The vulnerability exists due to a race condition in tick broadcast device handling when a broadcast device is replaced concurrently with tick broadcast operations. A local privileged user can cause a detached clock event device to be armed, triggering a kernel BUG.

The BUG condition occurs when the original broadcast device has a restricted interrupt-affinity mask and the last CPU in that mask goes offline.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/113a9796effe3376d2ec5aabcca1fef4fef4cd62
• https://git.kernel.org/stable/c/292b7a8ed84032cfdfc9076a690360f7d3f640d4
• https://git.kernel.org/stable/c/3525b94b2f258e0b99d1ee5a82a80b51bc1cc818
• https://git.kernel.org/stable/c/3da55616db2b6b7d9caa3b7ff1e8983224e0ed52