CVE-2026-46129 in Linux
要約
〜によって MITRE • 2026年05月28日
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.
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