CVE-2026-68450

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> btrfs: free mapping node on duplicate reloc root insert<br /> <br /> __add_reloc_root() allocates a mapping_node before inserting it into<br /> rc-&gt;reloc_root_tree. If rb_simple_insert() finds an existing entry, it<br /> returns the existing rb_node and leaves the newly allocated node unlinked.<br /> <br /> The error path then returns -EEXIST without freeing the new node. Since<br /> the node was never inserted into reloc_root_tree, the later cleanup in<br /> put_reloc_control() cannot find it either.<br /> <br /> Free the newly allocated node before returning -EEXIST.<br /> <br /> The callers currently assert that -EEXIST should not happen, so this is a<br /> defensive cleanup for an unexpected duplicate insert path. If the path is<br /> ever reached, the local allocation should still be released.