{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "04ae68af4107600120c3c41c94268f43bc350d48"
            },
            {
              "fixed": "2e5a70a175f0c74e7238b013a96c4eabc3002934"
            },
            {
              "fixed": "3ada20e110bf3245edb0a3bcddadc33d0f142f8d"
            },
            {
              "fixed": "60c74f42f5abddb85dd919b4448d5474e65dbe76"
            },
            {
              "fixed": "709eb41adaf78d59d4579a13a898125919b69bcc"
            },
            {
              "fixed": "7d658da725ea81c91f73087547b97e7ced82d62b"
            },
            {
              "fixed": "1b0dc3cbb8630f0b5cb34d848628225920a904be"
            },
            {
              "fixed": "cec0d03fe785380540dc1b4d07c80f67ae2ffc78"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "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-2026-89726.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlib/ucs2_string.c: fix out-of-bounds read in ucs2_strnlen()\n\nPatch series \"lib/ucs2_string.c: fix out-of-bounds read in\nucs2_strnlen()\", v2.\n\nThis series fixes an off-by-one out-of-bounds read in ucs2_strnlen().\n\nThe first patch is the real fix, the second patch comes as a bonus and\nfixes the code indentation.\n\n\nThis patch (of 2):\n\nucs2_strnlen() checks the current character before checking whether the\ncaller-provided maximum length has been reached.  If the input is not\nNUL-terminated within that bound, the loop can read one ucs2_char_t past\nthe limit.\n\nTest the length before dereferencing to prevent an off-by-one\nout-of-bounds read.",
  "id": "CVE-2026-89726",
  "modified": "2026-09-15T03:30:49.691530207Z",
  "published": "2026-09-11T19:46:37.480Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/04ae68af4107600120c3c41c94268f43bc350d48"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b0dc3cbb8630f0b5cb34d848628225920a904be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e5a70a175f0c74e7238b013a96c4eabc3002934"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ada20e110bf3245edb0a3bcddadc33d0f142f8d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60c74f42f5abddb85dd919b4448d5474e65dbe76"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/709eb41adaf78d59d4579a13a898125919b69bcc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d658da725ea81c91f73087547b97e7ced82d62b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cec0d03fe785380540dc1b4d07c80f67ae2ffc78"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89726.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89726"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "lib/ucs2_string.c: fix out-of-bounds read in ucs2_strnlen()"
}