CVE-2026-46164

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_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.

Package Linux Kernel
Published 2026-05-28
Last modified 2026-05-30
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.0

out of 10
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 6.6.122, 6.12.67, 6.1.162, 6.16 and later are affected. Fixed in 6.6.141, 6.12.90, 6.18.32, 7.0.7, 7.1-rc1 and their respective stable series.

Affected from
≥ 6.6.122 ≥ 6.12.67 ≥ 6.1.162 ≥ 6.16
Fixed in
✓ 6.6.141 6.6.x ✓ 6.12.90 6.12.x ✓ 6.18.32 6.18.x ✓ 7.0.7 7.0.x ✓ 7.1-rc1

References

The following references provide additional information about CVE-2026-46164 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

5 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2026-46164?

    CVE-2026-46164 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 . It affects Linux kernel versions from 6.6.122 onward and has been patched in 6.6.141, 6.12.90, 6.18.32 and others. CVE-2026-46164 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2026-46164?

    CVE-2026-46164 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2026-46164?

    Yes — CVE-2026-46164 has been patched. Fixed versions include 6.6.141, 6.12.90, 6.18.32 and others. If you are running Linux kernel 6.6.122 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-46164 actively exploited?

    No — CVE-2026-46164 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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