FKIE_CVE-2026-90422

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/540d91480bcb1b28a62d7023aa70947ea44c55b9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d35e45e5bad4fabcf122126402b6c6dcb4379672
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fea0b4fd891a2af77b55e05b950e7ea55b5d234e
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/clk/mediatek/clk-pllfh.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d35e45e5bad4fabcf122126402b6c6dcb4379672",
              "status": "affected",
              "version": "d7964de8a8ea800910fdd4e365c42a9e7d5c54aa",
              "versionType": "git"
            },
            {
              "lessThan": "fea0b4fd891a2af77b55e05b950e7ea55b5d234e",
              "status": "affected",
              "version": "d7964de8a8ea800910fdd4e365c42a9e7d5c54aa",
              "versionType": "git"
            },
            {
              "lessThan": "540d91480bcb1b28a62d7023aa70947ea44c55b9",
              "status": "affected",
              "version": "d7964de8a8ea800910fdd4e365c42a9e7d5c54aa",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/clk/mediatek/clk-pllfh.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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 cleans up itself in its error path before\nreturning, so the function callers don\u0027t 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."
    }
  ],
  "id": "CVE-2026-90422",
  "lastModified": "2026-09-17T17:17:46.770",
  "metrics": {},
  "published": "2026-09-17T17:17:46.770",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/540d91480bcb1b28a62d7023aa70947ea44c55b9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d35e45e5bad4fabcf122126402b6c6dcb4379672"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fea0b4fd891a2af77b55e05b950e7ea55b5d234e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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