Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.1.162, < 6.2 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/14b22be1dd844383eb03af9b1ee3b6b25d32aeafPatch
- https://git.kernel.org/stable/c/259af6857a1b4f1e9ef8b780353f9d11c26a22bdPatch
- https://git.kernel.org/stable/c/a7449edf96143f192606ec8647e3167e1ecbd728Patch
- https://git.kernel.org/stable/c/c2d59527cba6d59f0d77a75c1101ab4e69758bea
- https://git.kernel.org/stable/c/d2a675f2e238ec96c8e91e2718c1f910c9c8fb21Patch
- https://git.kernel.org/stable/c/dfd05a16b5c9d1d98b47905f37f2fccda52173d1Patch
FAQ
What is CVE-2026-46164?
CVE-2026-46164 is a vulnerability with a CVSS score of 7.0 (HIGH). 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_s...
How severe is CVE-2026-46164?
CVE-2026-46164 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46164?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.