{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-26878",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-26878"
  ],
  "published": "2024-04-17T10:29:01Z",
  "summary": "quota: Fix potential NULL pointer dereference",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nquota: Fix potential NULL pointer dereference\n\nBelow race may cause NULL pointer dereference\n\nP1\t\t\t\t\tP2\ndquot_free_inode\t\t\tquota_off\n\t\t\t\t\t  drop_dquot_ref\n\t\t\t\t\t   remove_dquot_ref\n\t\t\t\t\t   dquots = i_dquot(inode)\n  dquots = i_dquot(inode)\n  srcu_read_lock\n  dquots[cnt]) != NULL (1)\n\t\t\t\t\t     dquots[type] = NULL (2)\n  spin_lock(&dquots[cnt]->dq_dqb_lock) (3)\n   ....\n\nIf dquot_free_inode(or other routines) checks inode's quota pointers (1)\nbefore quota_off sets it to NULL(2) and use it (3) after that, NULL pointer\ndereference will be triggered.\n\nSo let's fix it by using a temporary pointer to avoid this issue.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-26878"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1"
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    "upstream_modified": "2026-05-12T04:54:46Z"
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}