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THREATINT
PUBLISHED

CVE-2024-27038

clk: Fix clk_core_get NULL dereference

Reserved:2024-02-19
Published:2024-05-01
Updated:2024-05-13

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.

Product status

Default status
unaffected

dde4eff47c82 before d7ae7d126568
affected

dde4eff47c82 before 239174535dba
affected

dde4eff47c82 before 0efb9ef6fb95
affected

dde4eff47c82 before a8b2b26fdd01
affected

dde4eff47c82 before a5d9b1aa61b4
affected

dde4eff47c82 before c554badcae9c
affected

dde4eff47c82 before 6f073b24a9e2
affected

dde4eff47c82 before e97fe4901e0f
affected

Default status
affected

5.2
affected

Any version before 5.2
unaffected

5.4.273
unaffected

5.10.214
unaffected

5.15.153
unaffected

6.1.83
unaffected

6.6.23
unaffected

6.7.11
unaffected

6.8.2
unaffected

6.9
unaffected

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

cve.org CVE-2024-27038

nvd.nist.gov CVE-2024-27038

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