CVE-2026-46129

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix double free in create_space_info() error path When kobject_init_and_add() fails, the call chain is: create_space_info() -> btrfs_sysfs_add_space_info_type() -> kobject_init_and_add() -> failure -> kobject_put(&space_info->kobj) -> space_info_release() -> kfree(space_info) Then control returns to create_space_info(): btrfs_sysfs_add_space_info_type() returns error -> goto out_free -> kfree(space_info) This causes a double free. Keep the direct kfree(space_info) for the earlier failure path, but after btrfs_sysfs_add_space_info_type() has called kobject_put(), let the kobject release callback handle the cleanup.

• linux linux kernel (>= 6.1.162 < 6.1.175) • linux linux kernel (>= 6.6.122 < 6.6.140) • linux linux kernel (>= 6.12.67 < 6.12.88) • linux linux kernel (>= 6.18.7 < 6.18.30) • linux linux kernel (>= 6.19.1 < 7.0.7) • linux linux kernel 6.19