{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-46840",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-46840"
  ],
  "published": "2024-09-27T12:40:05Z",
  "summary": "btrfs: clean up our handling of refs == 0 in snapshot delete",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: clean up our handling of refs == 0 in snapshot delete\n\nIn reada we BUG_ON(refs == 0), which could be unkind since we aren't\nholding a lock on the extent leaf and thus could get a transient\nincorrect answer.  In walk_down_proc we also BUG_ON(refs == 0), which\ncould happen if we have extent tree corruption.  Change that to return\n-EUCLEAN.  In do_walk_down() we catch this case and handle it correctly,\nhowever we return -EIO, which -EUCLEAN is a more appropriate error code.\nFinally in walk_up_proc we have the same BUG_ON(refs == 0), so convert\nthat to proper error handling.  Also adjust the error message so we can\nactually do something with the information.",
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        "ecosystem": "Raspberry Pi OS:12",
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        "1:6.6.20-1+rpt1",
        "1:6.6.28-1+rpt1",
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-46840"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c847b28a799733b04574060ab9d00f215970627d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/71291aa7246645ef622621934d2067400380645e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c60676b81fab456b672796830f6d8057058f029c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/728d4d045b628e006b48a448f3326a7194c88d32"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9cc887ac24b7a0598f4042ae9af6b9a33072f75b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7d1df13bf078ffebfedd361d714ff6cee1ff01b9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/03804641ec2d0da4fa088ad21c88e703d151ce16"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b8ccef048354074a548f108e51d0557d6adfd3a3"
    }
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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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}