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Review reviewHigh

CVE-2026-46129

Linux Linux, linux kernel

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_a...

CVSS
7.8
EPSS
0.14%
3.69% percentile
CISA KEV
Not listed
Published
2026.05.28
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.14%
Technical severityCVSS 7.8

Vulnerability overview

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_a...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
20e8f2de3688082eeafeb93c8900485b7542457e, 58208907c4044a764dbd8896026283905da6d9be, bb4fa4c0b54aae25e55faeda7f78d0c11b8cd618, 6cb008f1bb23e023dfe615cca5df14570dfc8da5, a11224a016d6d1d46a4d9b6573244448a80d4d7f, 6.1.162, 6.6.122, 6.12.67, 6.18.7, 6.19, >= 6.1.162 < 6.1.175, >= 6.6.122 < 6.6.140, >= 6.12.67 < 6.12.88, >= 6.18.7 < 6.18.30, >= 6.19.1 < 7.0.7
Fixed versions
6.1.175, 6.6.140, 6.12.88, 6.18.30, 7.0.7

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-415
CVE-2026-46129 — Linux Linux, linux kernel | SECUFOCUS NOW