ghsa-2g99-pch7-3284
Vulnerability from github
Published
2025-01-11 15:30
Modified
2025-01-31 18:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

bcache: revert replacing IS_ERR_OR_NULL with IS_ERR again

Commit 028ddcac477b ("bcache: Remove unnecessary NULL point check in node allocations") leads a NULL pointer deference in cache_set_flush().

1721 if (!IS_ERR_OR_NULL(c->root)) 1722 list_add(&c->root->list, &c->btree_cache);

From the above code in cache_set_flush(), if previous registration code fails before allocating c->root, it is possible c->root is NULL as what it is initialized. __bch_btree_node_alloc() never returns NULL but c->root is possible to be NULL at above line 1721.

This patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-48881"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-11T13:15:23Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbcache: revert replacing IS_ERR_OR_NULL with IS_ERR again\n\nCommit 028ddcac477b (\"bcache: Remove unnecessary NULL point check in\nnode allocations\") leads a NULL pointer deference in cache_set_flush().\n\n1721         if (!IS_ERR_OR_NULL(c-\u003eroot))\n1722                 list_add(\u0026c-\u003eroot-\u003elist, \u0026c-\u003ebtree_cache);\n\n\u003eFrom the above code in cache_set_flush(), if previous registration code\nfails before allocating c-\u003eroot, it is possible c-\u003eroot is NULL as what\nit is initialized. __bch_btree_node_alloc() never returns NULL but\nc-\u003eroot is possible to be NULL at above line 1721.\n\nThis patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this.",
  "id": "GHSA-2g99-pch7-3284",
  "modified": "2025-01-31T18:31:05Z",
  "published": "2025-01-11T15:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-48881"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/336e30f32ae7c043fde0f6fa21586ff30bea9fe2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4379c5828492a4c2a651c8f826a01453bd2b80b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5202391970ffbf81975251b3526b890ba027b715"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e0e913624bcd24f3de414475018d3023f060ee1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2e382ae12a63560fca35050498e19e760adf8c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc05aa2c0117e20fa25a3c0d915f98b8f2e78667"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb5fee35bdd18316a84b5f30881a24e1415e1464"
    }
  ],
  "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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