CVE-2024-44968
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…
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.22% probability · 13th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/541a900d245536d4809cb1aa322c3fcc2cdb58a6Patch
- https://git.kernel.org/stable/c/668c6c4a7e9e9f081c06b70f30104fb7013437edPatch
- https://git.kernel.org/stable/c/6881e75237a84093d0986f56223db3724619f26ePatch
- https://git.kernel.org/stable/c/7b3ec186ba93e333e9efe7254e7e31c1828e5d2dPatch
- https://git.kernel.org/stable/c/7dd12f85f150010ef7518201c63fa7e395f5c3e9Patch
- https://git.kernel.org/stable/c/b9d604933d5fd72dd37f24e1dc35f778297d745aPatch
- https://git.kernel.org/stable/c/f54abf332a2bc0413cfa8bd6a8511f7aa99faea0Patch
- https://git.kernel.org/stable/c/f91fb47ecacc178a83a77eeebd25cbaec18c01d6Patch
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.