Bug 2393514 (CVE-2025-39701)

Summary: CVE-2025-39701 kernel: ACPI: pfr_update: Fix the driver update version check
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-09-05 18:03:35 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ACPI: pfr_update: Fix the driver update version check

The security-version-number check should be used rather
than the runtime version check for driver updates.

Otherwise, the firmware update would fail when the update binary had
a lower runtime version number than the current one.

[ rjw: Changelog edits ]
Comment 1 Jon Moroney 2025-09-05 21:27:50 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090548-CVE-2025-39701-ce5e@gregkh/T