CVE-2024-27038

MEDIUM
Published May 1, 2024 Modified May 12, 2026 CWE-476

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.

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CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
debian debian_linux

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2024-27038? +
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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2024-27038? +
CVE-2024-27038 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-27038? +
CVE-2024-27038 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-27038? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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