CVE-2026-46129: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: from 6.1.162, before 6.1.175 (fixed in 6.1.175); from 6.6.122, before 6.6.140 (fixed in 6.6.140); from 6.12.67, before 6.12.88 (fixed in 6.12.88); from 6.18.7, before 6.18.30 (fixed in 6.18.30); from 6.19.1, before 7.0.7 (fixed in 7.0.7); version 6.19 only

Published 2026-05-28. Last modified 2026-06-24.