High 7.8Published May 28, 2026

CVE-2026-46129btrfs: fix double free in create_space_info() error path

Updated under an hour ago (Oct 26, 2026, 6:10 PM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Undergoing Analysis
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 20e8f2de3688082eeafeb93c8900485b7542457e before ae6d6e31ceb72b7697c28a528e4923c08e3c2ef5; from 58208907c4044a764dbd8896026283905da6d9be before c2670ec4aa49ca226bce9776601e0da37502be07; from bb4fa4c0b54aae25e55faeda7f78d0c11b8cd618 before f414b3abbba59ef379a2b3c31f2bdd9358ed5e53; from 6cb008f1bb23e023dfe615cca5df14570dfc8da5 before 9a060970fd7b5e1c561e4ce73cb9949e4269a738; from a11224a016d6d1d46a4d9b6573244448a80d4d7f before dd6ade0fdd59218d71a981ae7c937a304e49209c; from a11224a016d6d1d46a4d9b6573244448a80d4d7f before 3f487be81292702a59ea9dbc4088b3360a50e837; from 6.1.162 before 6.1.175; from 6.6.122 before 6.6.140; and 2 more ranges	CNA record
linux linux_kernel linux:linux_kernel	from 6.1.162 before 6.1.175; from 6.6.122 before 6.6.140; from 6.12.67 before 6.12.88; from 6.18.7 before 6.18.30; from 6.19.1 before 7.0.7; 6.19; 6.19; 6.19; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/ae6d6e31ceb72b7697c28a528e4923c08e3c2ef5	patch
https://git.kernel.org/stable/c/c2670ec4aa49ca226bce9776601e0da37502be07	patch
https://git.kernel.org/stable/c/f414b3abbba59ef379a2b3c31f2bdd9358ed5e53	patch
https://git.kernel.org/stable/c/9a060970fd7b5e1c561e4ce73cb9949e4269a738	patch
https://git.kernel.org/stable/c/dd6ade0fdd59218d71a981ae7c937a304e49209c	patch
https://git.kernel.org/stable/c/3f487be81292702a59ea9dbc4088b3360a50e837	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.