Vulnerability in Linux

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 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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (11.8th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2024-44968: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

  • Linux — versions dfe19aa91378972f10530635ad83b2d77f481044, 457a1c87d454455d671a3045cf0b56157be110a1, 9ef7190228145f959d9bc0ddca40ecf76bb413b0
  • Linux Kernel — versions 6.11

References

Frequently asked questions

What is CVE-2024-44968?
CVE-2024-44968 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2024-09-04.
How severe is CVE-2024-44968?
Medium severity. CVSS v3 base score is 5.5 out of 10.