{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-53618", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-07T15:16:59.655Z", "datePublished": "2025-10-07T15:19:25.303Z", "dateUpdated": "2025-10-07T15:19:25.303Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-10-07T15:19:25.303Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: reject invalid reloc tree root keys with stack dump\n\n[BUG]\nSyzbot reported a crash that an ASSERT() got triggered inside\nprepare_to_merge().\n\nThat ASSERT() makes sure the reloc tree is properly pointed back by its\nsubvolume tree.\n\n[CAUSE]\nAfter more debugging output, it turns out we had an invalid reloc tree:\n\n BTRFS error (device loop1): reloc tree mismatch, root 8 has no reloc root, expect reloc root key (-8, 132, 8) gen 17\n\nNote the above root key is (TREE_RELOC_OBJECTID, ROOT_ITEM,\nQUOTA_TREE_OBJECTID), meaning it's a reloc tree for quota tree.\n\nBut reloc trees can only exist for subvolumes, as for non-subvolume\ntrees, we just COW the involved tree block, no need to create a reloc\ntree since those tree blocks won't be shared with other trees.\n\nOnly subvolumes tree can share tree blocks with other trees (thus they\nhave BTRFS_ROOT_SHAREABLE flag).\n\nThus this new debug output proves my previous assumption that corrupted\non-disk data can trigger that ASSERT().\n\n[FIX]\nBesides the dedicated fix and the graceful exit, also let tree-checker to\ncheck such root keys, to make sure reloc trees can only exist for subvolumes."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/disk-io.c", "fs/btrfs/tree-checker.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "314135b7bae9618a317874ae195272682cf2d5d4", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "3ae93b316ca4b8b3c33798ef1d210355f2fb9318", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "84256e00eeca73c529fc6196e478cc89b8098157", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6ebcd021c92b8e4b904552e4d87283032100796d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/disk-io.c", "fs/btrfs/tree-checker.c"], "versions": [{"version": "5.15.127", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.46", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.4.11", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.5", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.127"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1.46"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.4.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/314135b7bae9618a317874ae195272682cf2d5d4"}, {"url": "https://git.kernel.org/stable/c/3ae93b316ca4b8b3c33798ef1d210355f2fb9318"}, {"url": "https://git.kernel.org/stable/c/84256e00eeca73c529fc6196e478cc89b8098157"}, {"url": "https://git.kernel.org/stable/c/6ebcd021c92b8e4b904552e4d87283032100796d"}], "title": "btrfs: reject invalid reloc tree root keys with stack dump", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: reject invalid reloc tree root keys with stack dump\n\n[BUG]\nSyzbot reported a crash that an ASSERT() got triggered inside\nprepare_to_merge().\n\nThat ASSERT() makes sure the reloc tree is properly pointed back by its\nsubvolume tree.\n\n[CAUSE]\nAfter more debugging output, it turns out we had an invalid reloc tree:\n\n BTRFS error (device loop1): reloc tree mismatch, root 8 has no reloc root, expect reloc root key (-8, 132, 8) gen 17\n\nNote the above root key is (TREE_RELOC_OBJECTID, ROOT_ITEM,\nQUOTA_TREE_OBJECTID), meaning it's a reloc tree for quota tree.\n\nBut reloc trees can only exist for subvolumes, as for non-subvolume\ntrees, we just COW the involved tree block, no need to create a reloc\ntree since those tree blocks won't be shared with other trees.\n\nOnly subvolumes tree can share tree blocks with other trees (thus they\nhave BTRFS_ROOT_SHAREABLE flag).\n\nThus this new debug output proves my previous assumption that corrupted\non-disk data can trigger that ASSERT().\n\n[FIX]\nBesides the dedicated fix and the graceful exit, also let tree-checker to\ncheck such root keys, to make sure reloc trees can only exist for subvolumes."}], "id": "CVE-2023-53618", "lastModified": "2025-10-07T16:15:44.297", "metrics": {}, "published": "2025-10-07T16:15:44.297", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/314135b7bae9618a317874ae195272682cf2d5d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3ae93b316ca4b8b3c33798ef1d210355f2fb9318"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6ebcd021c92b8e4b904552e4d87283032100796d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/84256e00eeca73c529fc6196e478cc89b8098157"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}