clk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90422
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:46 UTC
Updated2026-09-17 17:17:46 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: clk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path When mtk_clk_register_pllfhs function fails to register a PLL, it unregisters all PLLs and cleans up itself in its error path before returning, so the function callers don't need to do it. But contrary to mtk_clk_unregister_pllfhs function, that does almost the same sequence, it does not free the IO memory mapped on fhctl node, leading to a leak. Fix this leak by factorizing the cleanup sequence in a new private function and use it both mtk_clk_register_pllfhs and mtk_clk_unregister_pllfhs functions. Also, change the loop index start value to avoid the -1 operation on index at each loop.

Risk And Classification

EPSS: 0.001980000 probability, percentile 0.099000000 (date 2026-09-18)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d7964de8a8ea800910fdd4e365c42a9e7d5c54aa d35e45e5bad4fabcf122126402b6c6dcb4379672 git Not specified
CNA Linux Linux affected d7964de8a8ea800910fdd4e365c42a9e7d5c54aa fea0b4fd891a2af77b55e05b950e7ea55b5d234e git Not specified
CNA Linux Linux affected d7964de8a8ea800910fdd4e365c42a9e7d5c54aa 540d91480bcb1b28a62d7023aa70947ea44c55b9 git Not specified
CNA Linux Linux affected 6.2 Not specified
CNA Linux Linux unaffected 6.2 semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/fea0b4fd891a2af77b55e05b950e7ea55b5d234e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d35e45e5bad4fabcf122126402b6c6dcb4379672 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/540d91480bcb1b28a62d7023aa70947ea44c55b9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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