{"cve":"CVE-2026-68450","nvd":{"published":"2026-08-12T01:17:07.930","modified":"2026-08-19T17:20:50.807","status":"Received","description":"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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/14a8be9428435ee17f17fae7991215c246b7fd43","https://git.kernel.org/stable/c/29d9746812d8b7c37d594f484e994fd552c3ec33","https://git.kernel.org/stable/c/6a8269b6459ed870a8156c106a0f597383907872","https://git.kernel.org/stable/c/797dc567146c7e3c4f8d9680e4fbc76e0a6d9151","https://git.kernel.org/stable/c/92bedc0455552b42ada1a1f42b0e3a8593cdfccc"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:48:17.459049833+00:00"},"epss":{"cve":"CVE-2026-68450","score":0.00161,"percentile":0.05308,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}