CVE-2026-43393

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix chunk map leak in btrfsmapblock after btrfschunkmapnumcopies Fix a chunk map leak in btrfsmapblock: if we return early with -EINVAL, we're not freeing the chunk map that we've just looked up...

CVE-2026-43393

CVE-2026-43393 concerns the Linux kernel’s btrfs file system. The vulnerability is a memory/resource leak in btrfs_map_block() where, on an early error return (-EINVAL), the allocated chunk map is not freed, potentially leading to memory exhaustion and instability. Several connected advisories re...