clk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path (CVE-2026-90422) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90422

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

Answer in brief

CVE-2026-90422 records a Unknown severity vulnerability in clk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=d7964de8a8ea800910fdd4e365c42a9e7d5c54aa <d35e45e5bad4fabcf122126402b6c6dcb4379672 \|\| >=d7964de8a8ea800910fdd4e365c42a9e7d5c54aa <fea0b4fd891a2af77b55e05b950e7ea55b5d234e \|\| >=d7964de8a8ea800910fdd4e365c42a9e7d5c54aa <540d91480bcb1b28a62d7023aa70947ea44c55b9	d35e45e5bad4fabcf122126402b6c6dcb4379672, fea0b4fd891a2af77b55e05b950e7ea55b5d234e, 540d91480bcb1b28a62d7023aa70947ea44c55b9
Linux/Linuxgeneric	6.2	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to d35e45e5bad4fabcf122126402b6c6dcb4379672 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

In 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.

Quoted source text, attributed separately from HOL analysis.