PT-2025-46638 · Linux+2 · Linux Kernel+2
Published
2025-10-10
·
Updated
2026-02-24
·
CVE-2025-40163
CVSS v2.0
4.6
Medium
| Vector | AV:L/AC:L/Au:S/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a flaw in the scheduling/deadline component. A kernel warning can occur when a CPU removal operation is performed using drmgr, specifically with the command 'drmgr -c cpu -r -q 1'. This is due to the
dl server hrtimer being enqueued close to CPU offline, leading to a warning when the hrtimer fires after the CPU has been removed from the cpu present mask. The issue stems from the dl server not being stopped before the CPU is marked as dead. The fix involves stopping the dl server before the CPU is marked offline. The cpudl set function and dl server timer are involved in the issue.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu