Tracker / CVE-2026-46164
CVE-2026-46164
High 7.0
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 and versions
| linux | linux_kernel · 6.1.162 → 6.2 |
|---|---|
| linux | linux_kernel · 6.12.67 → 6.12.90 |
| linux | linux_kernel · 6.16 → 6.18.32 |
| linux | linux_kernel · 6.19 → 7.0.7 |
| linux | linux_kernel · 6.6.122 → 6.6.141 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.