CVE-2024-44968: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: tick/broadcast: Move per CPU pointer access into the atomic section The recent fix for making the take over of the broadcast timer more reliable retrieves a per CPU pointer in preemptible context. This went unnoticed as compilers hoist the access into the non-preemptible region where the pointer is actually used. But of course it's valid that the compiler keeps it at the place where the code puts it which rightfully triggers: BUG: using smp_processor_id() in preemptible [00000000] code: caller is hotplug_cpu__broadcast_tick_pull+0x1c/0xc0 Move it to the actual usage site which is in a non-preemptible region.

Affected products

• Linux Linux Kernel: from 6.1.103, before 6.1.105 (fixed in 6.1.105); from 6.6.44, before 6.6.46 (fixed in 6.6.46); from 6.10.3, before 6.10.5 (fixed in 6.10.5); version 6.11 only

Published 2024-09-04. Last modified 2026-06-17.