{"id":"CVE-2026-90422","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nclk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path\n\nWhen mtk_clk_register_pllfhs function fails to register a PLL, it\nunregisters all PLLs and cl…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nclk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path\n\nWhen mtk_clk_register_pllfhs function fails to register a PLL, it\nunregisters all PLLs and cl…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= d7964de8a8ea800910fdd4e365c42a9e7d5c54aa < d35e45e5bad4fabcf122126402b6c6dcb4379672","Linux >= d7964de8a8ea800910fdd4e365c42a9e7d5c54aa < fea0b4fd891a2af77b55e05b950e7ea55b5d234e","Linux >= d7964de8a8ea800910fdd4e365c42a9e7d5c54aa < 540d91480bcb1b28a62d7023aa70947ea44c55b9","Linux 6.2"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:46.770","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90422","references":[{"url":"https://git.kernel.org/stable/c/540d91480bcb1b28a62d7023aa70947ea44c55b9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d35e45e5bad4fabcf122126402b6c6dcb4379672","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fea0b4fd891a2af77b55e05b950e7ea55b5d234e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.794Z","epss":0.00198,"epssPercentile":0.09859,"slug":"CVE-2026-90422","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nclk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path\n\nWhen mtk_clk_register_pllfhs function fails to register a PLL, it\nunregisters all PLLs and cleans up itself in its error path before\nreturning, so the function callers don't need to do it.\n\nBut contrary to mtk_clk_unregister_pllfhs function, that does almost\nthe same sequence, it does not free the IO memory mapped on fhctl node,\nleading to a leak.\n\nFix this leak by factorizing the cleanup sequence in a new private\nfunction and use it both mtk_clk_register_pllfhs and\nmtk_clk_unregister_pllfhs functions.\n\nAlso, change the loop index start value to avoid the -1 operation on\nindex at each loop.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}