Riskcovery

CVE-2024-44968

tick/broadcast: Move per CPU pointer access into the atomic section

State
Published
Severity
Not scored
Published
Sep 4, 2024
Updated
May 11, 2026
Reserved
Aug 21, 2024

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • dfe19aa91378972f10530635ad83b2d77f481044 to before f54abf332a2bc0413cfa8bd6a8511f7aa99faea0Affected
  • 457a1c87d454455d671a3045cf0b56157be110a1 to before f91fb47ecacc178a83a77eeebd25cbaec18c01d6Affected
  • 9ef7190228145f959d9bc0ddca40ecf76bb413b0 to before 668c6c4a7e9e9f081c06b70f30104fb7013437edAffected
  • d3b165c10473aa6fc6141bb5b1f6e5b50c1fb774 to before 541a900d245536d4809cb1aa322c3fcc2cdb58a6Affected
  • 408bfb6b0a7f22e971ce6b600aec448769e580a8 to before 7b3ec186ba93e333e9efe7254e7e31c1828e5d2dAffected
  • 3a58c590f6bd1d20eb1e76c5cea31c36cc032339 to before b9d604933d5fd72dd37f24e1dc35f778297d745aAffected
  • 2cdab4b4bf77369961f706cdeb7d040db10c5217 to before 7dd12f85f150010ef7518201c63fa7e395f5c3e9Affected
  • f7d43dd206e7e18c182f200e67a8db8c209907fa to before 6881e75237a84093d0986f56223db3724619f26eAffected
LinuxLinux
  • 6.1.103 to before 6.1.105Affected
  • 6.6.44 to before 6.6.46Affected
  • 6.10.3 to before 6.10.5Affected

References

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