GHSA-PHF7-CPQM-749X

Vulnerability from github – Published: 2025-01-08 18:30 – Updated: 2025-11-03 21:32
VLAI
Details

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

btrfs: add a sanity check for btrfs root in btrfs_search_slot()

Syzbot reports a null-ptr-deref in btrfs_search_slot().

The reproducer is using rescue=ibadroots, and the extent tree root is corrupted thus the extent tree is NULL.

When scrub tries to search the extent tree to gather the needed extent info, btrfs_search_slot() doesn't check if the target root is NULL or not, resulting the null-ptr-deref.

Add sanity check for btrfs root before using it in btrfs_search_slot().

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-56774"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-08T18:15:18Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: add a sanity check for btrfs root in btrfs_search_slot()\n\nSyzbot reports a null-ptr-deref in btrfs_search_slot().\n\nThe reproducer is using rescue=ibadroots, and the extent tree root is\ncorrupted thus the extent tree is NULL.\n\nWhen scrub tries to search the extent tree to gather the needed extent\ninfo, btrfs_search_slot() doesn\u0027t check if the target root is NULL or\nnot, resulting the null-ptr-deref.\n\nAdd sanity check for btrfs root before using it in btrfs_search_slot().",
  "id": "GHSA-phf7-cpqm-749x",
  "modified": "2025-11-03T21:32:05Z",
  "published": "2025-01-08T18:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56774"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ed51857a50f530ac7a1482e069dfbd1298558d4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/757171d1369b3b47f36932d40a05a0715496dcab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/93992c3d9629b02dccf6849238559d5c24f2dece"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c71d114ef68c95da5a82ec85a721ab31f5bd905b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db66fb87c21e8ae724886e6a464dcbac562a64c6"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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