{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "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": "2026-05-23T15:30:09.733Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T15:30:09.733Z"
            },
            "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": "259ee7754b6793af8bdd77f9ca818bc41cfe9541",
                            "lessThan": "314135b7bae9618a317874ae195272682cf2d5d4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "259ee7754b6793af8bdd77f9ca818bc41cfe9541",
                            "lessThan": "3ae93b316ca4b8b3c33798ef1d210355f2fb9318",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "259ee7754b6793af8bdd77f9ca818bc41cfe9541",
                            "lessThan": "84256e00eeca73c529fc6196e478cc89b8098157",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "259ee7754b6793af8bdd77f9ca818bc41cfe9541",
                            "lessThan": "6ebcd021c92b8e4b904552e4d87283032100796d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3d95c52d789ca99e344061d7f6dadb2519adbcf5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fba904d68c8bbfcc89c2210cfcb2351be90bc3e5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.2.19",
                            "lessThan": "5.3",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.3.4",
                            "lessThan": "5.4",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "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": "5.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "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:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "5.15.127"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.1.46"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.4.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.2.19"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3.4"
                                }
                            ]
                        }
                    ]
                }
            ],
            "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"
            }
        }
    }
}