CVE-2026-46129

HighCVSS 7.8/10Last modified Jun 24, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix double free in create_space_info() error path

When kobject_init_and_add() fails, the call chain is:

create_space_info() -> btrfs_sysfs_add_space_info_type() -> kobject_init_and_add() -> failure -> kobject_put(&space_info->kobj) -> space_info_release() -> kfree(space_info)

Then control returns to create_space_info():

btrfs_sysfs_add_space_info_type() returns error -> goto out_free -> kfree(space_info)

This causes a double free.

Keep the direct kfree(space_info) for the earlier failure path, but after btrfs_sysfs_add_space_info_type() has called kobject_put(), let the kobject release callback handle the cleanup.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-415

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 20e8f2de3688082eeafeb93c8900485b7542457e, < ae6d6e31ceb72b7697c28a528e4923c08e3c2ef5; >= 58208907c4044a764dbd8896026283905da6d9be, < c2670ec4aa49ca226bce9776601e0da37502be07; >= bb4fa4c0b54aae25e55faeda7f78d0c11b8cd618, < f414b3abbba59ef379a2b3c31f2bdd9358ed5e53; >= 6cb008f1bb23e023dfe615cca5df14570dfc8da5, < 9a060970fd7b5e1c561e4ce73cb9949e4269a738; >= a11224a016d6d1d46a4d9b6573244448a80d4d7f, < dd6ade0fdd59218d71a981ae7c937a304e49209c; >= a11224a016d6d1d46a4d9b6573244448a80d4d7f, < 3f487be81292702a59ea9dbc4088b3360a50e837; >= 6.1.162, < 6.1.175; >= 6.6.122, < 6.6.140; >= 6.12.67, < 6.12.88; >= 6.18.7, < 6.18.30
LinuxLinux6.19

References

Timeline

Published
May 28, 2026
Last modified
Jun 24, 2026
NVD status
Undergoing Analysis

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CVE-2026-46129: High severity, CVSS 7.8 | Vulnix