Vulnerability-Lookup

GHSA-67C6-765V-26G2

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:31

Details

In the Linux kernel, the following vulnerability has been resolved:

hpfs: fix a crash if hpfs_map_dnode_bitmap fails

If hpfs_map_dnode_bitmap fails, the code would call hpfs_brelse4 on uninitialized quad buffer head, causing a crash.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-63954"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:14Z",
    "severity": "HIGH"
  },
  "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": "GHSA-67c6-765v-26g2",
  "modified": "2026-07-20T15:31:53Z",
  "published": "2026-07-19T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63954"
    },
    {
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-63954 (GCVE-0-2026-63954)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-20 13:41

Title

hpfs: fix a crash if hpfs_map_dnode_bitmap fails

Summary

In the Linux kernel, the following vulnerability has been resolved: hpfs: fix a crash if hpfs_map_dnode_bitmap fails If hpfs_map_dnode_bitmap fails, the code would call hpfs_brelse4 on uninitialized quad buffer head, causing a crash.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/010b08084000ef018…
https://git.kernel.org/stable/c/d98d8562b3284b5a5…
https://git.kernel.org/stable/c/1648a3c7f4e18f46a…
https://git.kernel.org/stable/c/7c58c55a2a16f7274…
https://git.kernel.org/stable/c/1d73a533760bc5abb…
https://git.kernel.org/stable/c/0886c6f257fe3663f…
https://git.kernel.org/stable/c/4f37bb30b57d6d403…
https://git.kernel.org/stable/c/974820a59efde7c1a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 010b08084000ef018f1a8de5197087f3b91d8cfe (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d98d8562b3284b5a5c8eb67e71b794508e46e288 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1648a3c7f4e18f46a4881920133fc4f2494185a0 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7c58c55a2a16f7274772507bd1637be609351b4f (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1d73a533760bc5abb83b3cc759133596f7bb708f (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0886c6f257fe3663f80218aa1919b0f3f21bf22c (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4f37bb30b57d6d403d02673074555bd3c3602bef (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 974820a59efde7c1a7e1260bcfe9bb81f833cc9f (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.93 , ≤ 6.12.* (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/hpfs/alloc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "010b08084000ef018f1a8de5197087f3b91d8cfe",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "d98d8562b3284b5a5c8eb67e71b794508e46e288",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "1648a3c7f4e18f46a4881920133fc4f2494185a0",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "7c58c55a2a16f7274772507bd1637be609351b4f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "1d73a533760bc5abb83b3cc759133596f7bb708f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "0886c6f257fe3663f80218aa1919b0f3f21bf22c",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "4f37bb30b57d6d403d02673074555bd3c3602bef",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "974820a59efde7c1a7e1260bcfe9bb81f833cc9f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/hpfs/alloc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.259",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.210",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.176",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.143",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.93",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.35",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.12",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T13:41:52.092Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/010b08084000ef018f1a8de5197087f3b91d8cfe"
        },
        {
          "url": "https://git.kernel.org/stable/c/d98d8562b3284b5a5c8eb67e71b794508e46e288"
        },
        {
          "url": "https://git.kernel.org/stable/c/1648a3c7f4e18f46a4881920133fc4f2494185a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/7c58c55a2a16f7274772507bd1637be609351b4f"
        },
        {
          "url": "https://git.kernel.org/stable/c/1d73a533760bc5abb83b3cc759133596f7bb708f"
        },
        {
          "url": "https://git.kernel.org/stable/c/0886c6f257fe3663f80218aa1919b0f3f21bf22c"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f37bb30b57d6d403d02673074555bd3c3602bef"
        },
        {
          "url": "https://git.kernel.org/stable/c/974820a59efde7c1a7e1260bcfe9bb81f833cc9f"
        }
      ],
      "title": "hpfs: fix a crash if hpfs_map_dnode_bitmap fails",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63954",
    "datePublished": "2026-07-19T14:55:46.183Z",
    "dateReserved": "2026-07-19T07:54:57.023Z",
    "dateUpdated": "2026-07-20T13:41:52.092Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-67C6-765V-26G2

CVE-2026-63954 (GCVE-0-2026-63954)

Tags

Sightings

Nomenclature