{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b"
            },
            {
              "fixed": "14afe18655c0951f4f85898f761bf92264e65ccd"
            },
            {
              "fixed": "c1a62f9dcf531d56c56da2e4435386b6d264c69f"
            },
            {
              "fixed": "4486e75ba647bd8b98fc1f053101b40caceeed4b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.15.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89721.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nphy: rockchip-samsung-dcphy: fix out-of-range max_register\n\nThe PHY register block is 64KB, so with a register stride of 4 the\nlast accessible register sits at offset 0xfffc. max_register names\n0x10000, one register past the end of the mapping: dumping the\nregisters through the regmap debugfs interface reads beyond the\nioremapped region and oopses on the unmapped page. The oops fires\nwith the regmap lock held, so later PHY operations deadlock.",
  "id": "CVE-2026-89721",
  "modified": "2026-09-13T03:30:27.928894267Z",
  "published": "2026-09-11T19:46:33.680Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14afe18655c0951f4f85898f761bf92264e65ccd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4486e75ba647bd8b98fc1f053101b40caceeed4b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c1a62f9dcf531d56c56da2e4435386b6d264c69f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89721.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89721"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "phy: rockchip-samsung-dcphy: fix out-of-range max_register"
}