{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-68450",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-30T09:28:09.395Z",
        "datePublished": "2026-08-12T00:51:48.970Z",
        "dateUpdated": "2026-08-19T16:35:45.490Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-19T16:35:45.490Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: free mapping node on duplicate reloc root insert\n\n__add_reloc_root() allocates a mapping_node before inserting it into\nrc->reloc_root_tree.  If rb_simple_insert() finds an existing entry, it\nreturns the existing rb_node and leaves the newly allocated node unlinked.\n\nThe error path then returns -EEXIST without freeing the new node.  Since\nthe node was never inserted into reloc_root_tree, the later cleanup in\nput_reloc_control() cannot find it either.\n\nFree the newly allocated node before returning -EEXIST.\n\nThe callers currently assert that -EEXIST should not happen, so this is a\ndefensive cleanup for an unexpected duplicate insert path.  If the path is\never reached, the local allocation should still be released."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/btrfs/relocation.c"
                    ],
                    "versions": [
                        {
                            "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
                            "lessThan": "29d9746812d8b7c37d594f484e994fd552c3ec33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
                            "lessThan": "b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
                            "lessThan": "92bedc0455552b42ada1a1f42b0e3a8593cdfccc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
                            "lessThan": "14a8be9428435ee17f17fae7991215c246b7fd43",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
                            "lessThan": "797dc567146c7e3c4f8d9680e4fbc76e0a6d9151",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
                            "lessThan": "ae0629ff9ccb836416ada129f4edc7efea6eaaad",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57a304cfd43b2b4a5b44b8f5dc026abb34183068",
                            "lessThan": "6a8269b6459ed870a8156c106a0f597383907872",
                            "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/relocation.c"
                    ],
                    "versions": [
                        {
                            "version": "5.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.216",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.148",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.101",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.42",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.6",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "5.13",
                                    "versionEndExcluding": "5.15.216"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.1.183"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.6.148"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.12.101"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.18.42"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "7.1.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/29d9746812d8b7c37d594f484e994fd552c3ec33"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/92bedc0455552b42ada1a1f42b0e3a8593cdfccc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/14a8be9428435ee17f17fae7991215c246b7fd43"
                },
                {
                    "url": "https://git.kernel.org/stable/c/797dc567146c7e3c4f8d9680e4fbc76e0a6d9151"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ae0629ff9ccb836416ada129f4edc7efea6eaaad"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6a8269b6459ed870a8156c106a0f597383907872"
                }
            ],
            "title": "btrfs: free mapping node on duplicate reloc root insert",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}