{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "010b08084000ef018f1a8de5197087f3b91d8cfe"
            },
            {
              "fixed": "d98d8562b3284b5a5c8eb67e71b794508e46e288"
            },
            {
              "fixed": "1648a3c7f4e18f46a4881920133fc4f2494185a0"
            },
            {
              "fixed": "7c58c55a2a16f7274772507bd1637be609351b4f"
            },
            {
              "fixed": "1d73a533760bc5abb83b3cc759133596f7bb708f"
            },
            {
              "fixed": "0886c6f257fe3663f80218aa1919b0f3f21bf22c"
            },
            {
              "fixed": "4f37bb30b57d6d403d02673074555bd3c3602bef"
            },
            {
              "fixed": "974820a59efde7c1a7e1260bcfe9bb81f833cc9f"
            }
          ],
          "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": "5.10.259"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.210"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.93"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.35"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63954.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhpfs: fix a crash if hpfs_map_dnode_bitmap fails\n\nIf hpfs_map_dnode_bitmap fails, the code would call hpfs_brelse4 on\nuninitialized quad buffer head, causing a crash.",
  "id": "CVE-2026-63954",
  "modified": "2026-07-22T05:29:53.515599703Z",
  "published": "2026-07-19T14:55:46.183Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/010b08084000ef018f1a8de5197087f3b91d8cfe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0886c6f257fe3663f80218aa1919b0f3f21bf22c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1648a3c7f4e18f46a4881920133fc4f2494185a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d73a533760bc5abb83b3cc759133596f7bb708f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f37bb30b57d6d403d02673074555bd3c3602bef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c58c55a2a16f7274772507bd1637be609351b4f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/974820a59efde7c1a7e1260bcfe9bb81f833cc9f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d98d8562b3284b5a5c8eb67e71b794508e46e288"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63954.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63954"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "hpfs: fix a crash if hpfs_map_dnode_bitmap fails"
}