CVE-2026-43117 CRITICAL

CVE-2026-43117: btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()

Vendor Linux
Product Linux
Published May 6, 2026
Last update June 1, 2026
View on NVD All CVEs

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file() If overlay is used on top of btrfs, dentry->d_sb translates to overlay's super block and fsid assignment will lead to a crash. Use file_inode(file)->i_sb to always get btrfs_sb.

Key dates

02Disclosure timeline

May 6, 2026 CVE published
June 1, 2026 Record updated