TI-2026-33888 Aliases CVE-2026-46164 GHSA-rv72-f625-5h95

btrfs: fix double free in create_space_info_sub_group() error path

LOW 30CWE-415Published 2026-05-28 · Updated 2026-08-05

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: High
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-415 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.00136 3rd percentileScored 2026-11-07

Fix Fixed Linux (Linux): 6.1.176, 6.6.141, 6.12.90 +3

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.1.162 to before 6.1.176; 6.6.122 to before 6.6.141; 6.12.67 to before 6.12.90	6.1.176, 6.6.141, 6.12.90	Patch available	CNA
Linux	Linux	6.16 and later	6.1.176, 6.6.141, 6.12.90, 6.18.32, 7.0.7, 7.1	Patch available	CNA

Linux VendorLinux Affected 6.1.162 to before 6.1.176; 6.6.122 to before 6.6.141; 6.12.67 to before 6.12.90 Fixed in 6.1.176, 6.6.141, 6.12.90 Patch available CNA
Linux VendorLinux Affected 6.16 and later Fixed in 6.1.176, 6.6.141, 6.12.90, 6.18.32, 7.0.7, 7.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	6.1.162 to before 6.2; 6.6.122 to before 6.6.141; 6.12.67 to before 6.12.90; 6.16 to before 6.18.32; 6.19 to before 7.0.7	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.1.162 to before 6.2; 6.6.122 to before 6.6.141; 6.12.67 to before 6.12.90; 6.16 to before 6.18.32; 6.19 to before 7.0.7 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.1.176, 6.6.141, 6.12.90
Fix · CNA Linux (Linux) Fixed in 6.1.176, 6.6.141, 6.12.90, 6.18.32, 7.0.7, 7.1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 5 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2026-46164
2026-10-03 Alias added: GHSA-rv72-f625-5h95
2026-10-20 Affected versions changed · Red Hat

References

Patch 5

Other 1

https://git.kernel.org/stable/c/c2d59527cba6d59f0d77a75c1101ab4e69758bea

TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3

See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences