CVE-2026-46164 Details
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.
A double free vulnerability has been identified in the Linux kernel's Btrfs file system management. This issue arises in the 'create_space_info_sub_group' function, where a failure in initializing a kobject leads to the premature release of a memory structure. The error handling process inadvertently frees the same memory twice, creating a potential for memory corruption. This vulnerability affects several versions of the Linux kernel.
Users can upgrade to the latest stable version of the Linux kernel, where this vulnerability has been fixed. Instructions for downloading the latest kernel version can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/14b22be1dd844383eb03af9b1ee3b6b25d32aeaf | kernel.org | Patch |
| https://git.kernel.org/stable/c/259af6857a1b4f1e9ef8b780353f9d11c26a22bd | kernel.org | Patch |
| https://git.kernel.org/stable/c/a7449edf96143f192606ec8647e3167e1ecbd728 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c2d59527cba6d59f0d77a75c1101ab4e69758bea | kernel.org | |
| https://git.kernel.org/stable/c/d2a675f2e238ec96c8e91e2718c1f910c9c8fb21 | kernel.org | Patch |
| https://git.kernel.org/stable/c/dfd05a16b5c9d1d98b47905f37f2fccda52173d1 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-415 | Double Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.1.162, < 6.2 >= 6.6.122, < 6.6.141 >= 6.12.67, < 6.12.90 >= 6.16, < 6.18.32 >= 6.19, < 7.0.7 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 19, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 10, 2026 | Initial Analysis | [email protected] |
| May 30, 2026 | CVE Modified | kernel.org |
| May 28, 2026 | New CVE Received | kernel.org |