{"id":"CVE-2026-68450","summary":"btrfs: free mapping node on duplicate reloc root insert","details":"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-\u003ereloc_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.","modified":"2026-08-21T03:30:40.179719756Z","published":"2026-08-12T00:51:48.970Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68450.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/14a8be9428435ee17f17fae7991215c246b7fd43"},{"type":"WEB","url":"https://git.kernel.org/stable/c/29d9746812d8b7c37d594f484e994fd552c3ec33"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6a8269b6459ed870a8156c106a0f597383907872"},{"type":"WEB","url":"https://git.kernel.org/stable/c/797dc567146c7e3c4f8d9680e4fbc76e0a6d9151"},{"type":"WEB","url":"https://git.kernel.org/stable/c/92bedc0455552b42ada1a1f42b0e3a8593cdfccc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ae0629ff9ccb836416ada129f4edc7efea6eaaad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68450.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68450"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"57a304cfd43b2b4a5b44b8f5dc026abb34183068"},{"fixed":"29d9746812d8b7c37d594f484e994fd552c3ec33"},{"fixed":"b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8"},{"fixed":"92bedc0455552b42ada1a1f42b0e3a8593cdfccc"},{"fixed":"14a8be9428435ee17f17fae7991215c246b7fd43"},{"fixed":"797dc567146c7e3c4f8d9680e4fbc76e0a6d9151"},{"fixed":"ae0629ff9ccb836416ada129f4edc7efea6eaaad"},{"fixed":"6a8269b6459ed870a8156c106a0f597383907872"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68450.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.13.0"},{"fixed":"5.15.216"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68450.json"}}],"schema_version":"1.9.0"}