Bug 2429115 (CVE-2025-68789)

Summary: CVE-2025-68789 kernel: hwmon: (ibmpex) fix use-after-free in high/low store
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2026-01-13 16:07:48 UTC 
In the Linux kernel, the following vulnerability has been resolved:

hwmon: (ibmpex) fix use-after-free in high/low store

The ibmpex_high_low_store() function retrieves driver data using
dev_get_drvdata() and uses it without validation. This creates a race
condition where the sysfs callback can be invoked after the data
structure is freed, leading to use-after-free.

Fix by adding a NULL check after dev_get_drvdata(), and reordering
operations in the deletion path to prevent TOCTOU.
Comment 1 Jon Moroney 2026-01-14 22:12:22 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026011304-CVE-2025-68789-cca8@gregkh/T