CVE-2024-44968

Source
https://nvd.nist.gov/vuln/detail/CVE-2024-44968
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-44968.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-44968
Downstream
Related
Published
2024-09-04T19:15:31Z
Modified
2025-08-09T20:01:27Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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 smpprocessorid() in preemptible [00000000] code: caller is hotplugcpubroadcasttick_pull+0x1c/0xc0

Move it to the actual usage site which is in a non-preemptible region.

References

Affected packages