SB2026081728 - Improper input validation in Linux kernel liveupdate
Published: August 17, 2026
Security Bulletin ID
SB2026081728
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper input validation (CVE-ID: CVE-2026-68455)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper input validation in luo_session_ioctl() when handling session ioctl operations. A local user can invoke an ioctl intended for a different session type to cause a denial of service.
The issue can trigger unexpected internal errors and WARN() messages when incoming-only operations are used on an outgoing session.
Remediation
Install update from vendor's website.