CVE-2026-46129
Description
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.
How to fix
- linux linux_kernel6.1.175, 6.6.140, 6.12.88, 6.18.30, 7.0.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.1.162 ≤ v < 6.1.175, 6.6.122 ≤ v < 6.6.140, 6.12.67 ≤ v < 6.12.88, 6.18.7 ≤ v < 6.18.30, 6.19.1 ≤ v < 7.0.7, 6.19 | 6.1.175, 6.6.140, 6.12.88, 6.18.30, 7.0.7 |
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