{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-44963",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-44963"
  ],
  "published": "2024-09-04T18:36:26Z",
  "summary": "btrfs: do not BUG_ON() when freeing tree block after error",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not BUG_ON() when freeing tree block after error\n\nWhen freeing a tree block, at btrfs_free_tree_block(), if we fail to\ncreate a delayed reference we don't deal with the error and just do a\nBUG_ON(). The error most likely to happen is -ENOMEM, and we have a\ncomment mentioning that only -ENOMEM can happen, but that is not true,\nbecause in case qgroups are enabled any error returned from\nbtrfs_qgroup_trace_extent_post() (can be -EUCLEAN or anything returned\nfrom btrfs_search_slot() for example) can be propagated back to\nbtrfs_free_tree_block().\n\nSo stop doing a BUG_ON() and return the error to the callers and make\nthem abort the transaction to prevent leaking space. Syzbot was\ntriggering this, likely due to memory allocation failure injection.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-44963"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/22d907bcd283d69d5e60497fc0d51969545c583b"
    },
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      "url": "https://git.kernel.org/stable/c/98251cd60b4d702a8a81de442ab621e83a3fb24f"
    },
    {
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      "url": "https://git.kernel.org/stable/c/bb3868033a4cccff7be57e9145f2117cbdc91c11"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
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}