CVE-2024-50273 (GCVE-0-2024-50273)

Vulnerability from cvelistv5 – Published: 2024-11-19 01:30 – Updated: 2025-11-03 22:27
VLAI?
Title
btrfs: reinitialize delayed ref list after deleting it from the list
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: reinitialize delayed ref list after deleting it from the list At insert_delayed_ref() if we need to update the action of an existing ref to BTRFS_DROP_DELAYED_REF, we delete the ref from its ref head's ref_add_list using list_del(), which leaves the ref's add_list member not reinitialized, as list_del() sets the next and prev members of the list to LIST_POISON1 and LIST_POISON2, respectively. If later we end up calling drop_delayed_ref() against the ref, which can happen during merging or when destroying delayed refs due to a transaction abort, we can trigger a crash since at drop_delayed_ref() we call list_empty() against the ref's add_list, which returns false since the list was not reinitialized after the list_del() and as a consequence we call list_del() again at drop_delayed_ref(). This results in an invalid list access since the next and prev members are set to poison pointers, resulting in a splat if CONFIG_LIST_HARDENED and CONFIG_DEBUG_LIST are set or invalid poison pointer dereferences otherwise. So fix this by deleting from the list with list_del_init() instead.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-908 - Use of Uninitialized Resource
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < 2fd0948a483e9cb2d669c7199bc620a21c97673d (git)
Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < 93c5b8decc0ef39ba84f4211d2db6da0a4aefbeb (git)
Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < bf0b0c6d159767c0d1c21f793950d78486690ee0 (git)
Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < c24fa427fc0ae827b2a3a07f13738cbf82c3f851 (git)
Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < 2cb1a73d1d44a1c11b0ee5eeced765dd80ec48e6 (git)
Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < f04be6d68f715c1473a8422fc0460f57b5e99931 (git)
Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < 50a3933760b427759afdd23156a7280a19357a92 (git)
Affected: 1d57ee941692d0cc928526e21a1557b2ae3e11db , < c9a75ec45f1111ef530ab186c2a7684d0a0c9245 (git)
Create a notification for this product.
    Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 4.19.324 , ≤ 4.19.* (semver)
Unaffected: 5.4.286 , ≤ 5.4.* (semver)
Unaffected: 5.10.230 , ≤ 5.10.* (semver)
Unaffected: 5.15.172 , ≤ 5.15.* (semver)
Unaffected: 6.1.117 , ≤ 6.1.* (semver)
Unaffected: 6.6.61 , ≤ 6.6.* (semver)
Unaffected: 6.11.8 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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\"https://git.kernel.org/stable/c/2cb1a73d1d44a1c11b0ee5eeced765dd80ec48e6\"}, {\"url\": \"https://git.kernel.org/stable/c/f04be6d68f715c1473a8422fc0460f57b5e99931\"}, {\"url\": \"https://git.kernel.org/stable/c/50a3933760b427759afdd23156a7280a19357a92\"}, {\"url\": \"https://git.kernel.org/stable/c/c9a75ec45f1111ef530ab186c2a7684d0a0c9245\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: reinitialize delayed ref list after deleting it from the list\\n\\nAt insert_delayed_ref() if we need to update the action of an existing\\nref to BTRFS_DROP_DELAYED_REF, we delete the ref from its ref head\u0027s\\nref_add_list using list_del(), which leaves the ref\u0027s add_list member\\nnot reinitialized, as list_del() sets the next and prev members of the\\nlist to LIST_POISON1 and LIST_POISON2, respectively.\\n\\nIf later we end up calling drop_delayed_ref() against the ref, which can\\nhappen during merging or when destroying delayed refs due to a transaction\\nabort, we can trigger a crash since at drop_delayed_ref() we call\\nlist_empty() against the ref\u0027s add_list, which returns false since\\nthe list was not reinitialized after the list_del() and as a consequence\\nwe call list_del() again at drop_delayed_ref(). This results in an\\ninvalid list access since the next and prev members are set to poison\\npointers, resulting in a splat if CONFIG_LIST_HARDENED and\\nCONFIG_DEBUG_LIST are set or invalid poison pointer dereferences\\notherwise.\\n\\nSo fix this by deleting from the list with list_del_init() instead.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.324\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.286\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.230\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.172\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.117\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.61\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.8\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"4.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:50:28.471Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50273\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T22:27:54.002Z\", \"dateReserved\": \"2024-10-21T19:36:19.983Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-11-19T01:30:12.589Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.