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FKIE_CVE-2026-93095

Vulnerability from fkie_nvd - Published: 2026-09-17 17:18 - Updated: 2026-09-17 17:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: hfsplus: validate thread record before delete key rebuild hfsplus_delete_cat() is called with str == NULL when the last open reference to an unlinked HFS+ hardlink backing inode is closed. In that case, the function finds the catalog thread by CNID and rebuilds the catalog key from thread.nodeName. That reconstruction path reads thread.nodeName.length directly from the catalog B-tree into fd.search_key and then copies length * 2 bytes into fd.search_key->cat.name.unicode. It does not first check that the found record is a thread record or that its size matches the thread name. A corrupted image can therefore provide an oversized thread name length and make hfs_bnode_read() write past the catalog search-key allocation. Read the CNID record through hfsplus_brec_read_cat(), which bounds the record read to sizeof(hfsplus_cat_entry) and verifies that a thread record's size exactly matches nodeName.length. Together, these checks ensure an accepted thread name fits HFSPLUS_MAX_STRLEN. Reject non-thread records before building the delete key from the validated thread name. Share the thread-record-type helper between hfsplus_find_cat() and hfsplus_delete_cat().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/33cda0036bc683fc888c20b04a5fc030e3e8413b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/473ea7aa35615829f0de7a71e8691d69dc24e328
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7898beee166c1145c0bca364d687b8437435bf1a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/af48abc1b00d865c3f4c4d76b901c44115cb7162
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b9729c51a8b67f8b20b8a8cf395da4be63a0c15b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e20f3b749ad241df77ec1c3e13a9c22209aa1eb3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2ea5cac61acfc11dad22f1d2d4bc71d56c52a20
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e31985c67ba00a59d9b1340af473c1dbe6c87856
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/hfsplus/catalog.c",
            "fs/hfsplus/hfsplus_fs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "33cda0036bc683fc888c20b04a5fc030e3e8413b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "b9729c51a8b67f8b20b8a8cf395da4be63a0c15b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "af48abc1b00d865c3f4c4d76b901c44115cb7162",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "e20f3b749ad241df77ec1c3e13a9c22209aa1eb3",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "7898beee166c1145c0bca364d687b8437435bf1a",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "e31985c67ba00a59d9b1340af473c1dbe6c87856",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "473ea7aa35615829f0de7a71e8691d69dc24e328",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "e2ea5cac61acfc11dad22f1d2d4bc71d56c52a20",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/hfsplus/catalog.c",
            "fs/hfsplus/hfsplus_fs.h"
          ],
          "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": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfsplus: validate thread record before delete key rebuild\n\nhfsplus_delete_cat() is called with str == NULL when the last open\nreference to an unlinked HFS+ hardlink backing inode is closed. In that\ncase, the function finds the catalog thread by CNID and rebuilds the\ncatalog key from thread.nodeName.\n\nThat reconstruction path reads thread.nodeName.length directly from the\ncatalog B-tree into fd.search_key and then copies length * 2 bytes into\nfd.search_key-\u003ecat.name.unicode. It does not first check that the found\nrecord is a thread record or that its size matches the thread name.\n\nA corrupted image can therefore provide an oversized thread name length\nand make hfs_bnode_read() write past the catalog search-key allocation.\n\nRead the CNID record through hfsplus_brec_read_cat(), which bounds the\nrecord read to sizeof(hfsplus_cat_entry) and verifies that a thread\nrecord\u0027s size exactly matches nodeName.length. Together, these checks\nensure an accepted thread name fits HFSPLUS_MAX_STRLEN. Reject non-thread\nrecords before building the delete key from the validated thread name.\n\nShare the thread-record-type helper between hfsplus_find_cat() and\nhfsplus_delete_cat()."
    }
  ],
  "id": "CVE-2026-93095",
  "lastModified": "2026-09-17T17:18:03.557",
  "metrics": {},
  "published": "2026-09-17T17:18:03.557",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/33cda0036bc683fc888c20b04a5fc030e3e8413b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/473ea7aa35615829f0de7a71e8691d69dc24e328"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7898beee166c1145c0bca364d687b8437435bf1a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/af48abc1b00d865c3f4c4d76b901c44115cb7162"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b9729c51a8b67f8b20b8a8cf395da4be63a0c15b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e20f3b749ad241df77ec1c3e13a9c22209aa1eb3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e2ea5cac61acfc11dad22f1d2d4bc71d56c52a20"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e31985c67ba00a59d9b1340af473c1dbe6c87856"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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