SB2026040169 - Local information disclosure in util-linux mount(8)
Published: April 1, 2026
Security Bulletin ID
SB2026040169
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Race condition (CVE-ID: CVE-2026-27456)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a race condition in the SUID binary /usr/bin/mount from util-linux. A local user can mount any root-owned file or block device that contains a valid filesystem, gaining full read access to its contents.
The mounted filesystem has MS_SECURE flags applied (nosuid, nodev, noexec), which prevents execution of SUID binaries but does not restrict reading data.
Remediation
Install update from vendor's website.