CVE-2026-46164: Linux Kernel

High severity, CVSS 7.0. 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_sub_group() error path When kobject_init_and_add() fails, the call chain is: create_space_info_sub_group() -> btrfs_sysfs_add_space_info_type() -> kobject_init_and_add() -> failure -> kobject_put(&sub_group->kobj) -> space_info_release() -> kfree(sub_group) Then control returns to create_space_info_sub_group(), where: btrfs_sysfs_add_space_info_type() returns error -> kfree(sub_group) Thus, sub_group is freed twice. Keep parent->sub_group[index] = NULL for the 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 6.2 (fixed in 6.2); from 6.6.122, before 6.6.141 (fixed in 6.6.141); from 6.12.67, before 6.12.90 (fixed in 6.12.90); from 6.16, before 6.18.32 (fixed in 6.18.32); from 6.19, before 7.0.7 (fixed in 7.0.7)

Published 2026-05-28. Last modified 2026-06-19.