CVE-2026-68450None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: btrfs: free mapping node on duplicate reloc root insert __add_reloc_root() allocates a mapping_node before inserting it into rc->reloc_root_tree. If rb_simple_insert(…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
btrfs: free mapping node on duplicate reloc root insert
__add_reloc_root() allocates a mapping_node before inserting it into rc->reloc_root_tree. If rb_simple_insert() finds an existing entry, it returns the existing rb_node and leaves the newly allocated node unlinked.
The error path then returns -EEXIST without freeing the new node. Since the node was never inserted into reloc_root_tree, the later cleanup in put_reloc_control() cannot find it either.
Free the newly allocated node before returning -EEXIST.
The callers currently assert that -EEXIST should not happen, so this is a defensive cleanup for an unexpected duplicate insert path. If the path is ever reached, the local allocation should still be released.
Linux >= 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < 29d9746812d8b7c37d594f484e994fd552c3ec33Linux >= 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < b7c5b8e1d5f0779dfbabc3068b7ac0f12e53b3a8Linux >= 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < 92bedc0455552b42ada1a1f42b0e3a8593cdfcccLinux >= 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < 14a8be9428435ee17f17fae7991215c246b7fd43Linux >= 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < 797dc567146c7e3c4f8d9680e4fbc76e0a6d9151Linux >= 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < ae0629ff9ccb836416ada129f4edc7efea6eaaadLinux >= 57a304cfd43b2b4a5b44b8f5dc026abb34183068 < 6a8269b6459ed870a8156c106a0f597383907872Linux 5.13Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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