CVE-2024-44968

MEDIUM EPSS 12.6%
Published Sep 4, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 4, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
12.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥6.1.103  –  <6.1.105
linuxlinux_kernel*≥6.6.44  –  <6.6.46
linuxlinux_kernel*≥6.10.3  –  <6.10.5
linuxlinux_kernel6.11any

References 10

  • git.kernel.org https://git.kernel.org/stable/c/541a900d245536d4809cb1aa322c3fcc2cdb58a6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/668c6c4a7e9e9f081c06b70f30104fb7013437ed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6881e75237a84093d0986f56223db3724619f26e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7b3ec186ba93e333e9efe7254e7e31c1828e5d2d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7dd12f85f150010ef7518201c63fa7e395f5c3e9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b9d604933d5fd72dd37f24e1dc35f778297d745a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f54abf332a2bc0413cfa8bd6a8511f7aa99faea0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f91fb47ecacc178a83a77eeebd25cbaec18c01d6
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/541a900d245536d4809cb1aa322c3fcc2cdb58a6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/668c6c4a7e9e9f081c06b70f30104fb7013437ed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6881e75237a84093d0986f56223db3724619f26e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7b3ec186ba93e333e9efe7254e7e31c1828e5d2d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7dd12f85f150010ef7518201c63fa7e395f5c3e9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b9d604933d5fd72dd37f24e1dc35f778297d745a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f54abf332a2bc0413cfa8bd6a8511f7aa99faea0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f91fb47ecacc178a83a77eeebd25cbaec18c01d6
    Patch