{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d7964de8a8ea800910fdd4e365c42a9e7d5c54aa"
            },
            {
              "fixed": "d35e45e5bad4fabcf122126402b6c6dcb4379672"
            },
            {
              "fixed": "fea0b4fd891a2af77b55e05b950e7ea55b5d234e"
            },
            {
              "fixed": "540d91480bcb1b28a62d7023aa70947ea44c55b9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90422.json"
  },
  "details": "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'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.",
  "id": "CVE-2026-90422",
  "modified": "2026-09-19T03:30:41.475151094Z",
  "published": "2026-09-17T16:09:45.830Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/540d91480bcb1b28a62d7023aa70947ea44c55b9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d35e45e5bad4fabcf122126402b6c6dcb4379672"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fea0b4fd891a2af77b55e05b950e7ea55b5d234e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90422.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90422"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "clk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path"
}