SB2026040975 - Local denial of service in Avahi
Published: April 9, 2026
Security Bulletin ID
SB2026040975
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Reachable assertion (CVE-ID: CVE-2026-34933)
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to reachable assertion in transport_flags_from_domain() when handling D-Bus method calls with conflicting publish flags. A local user can send a specially crafted D-Bus method call to cause a denial of service.
The issue can be triggered through org.freedesktop.Avahi.EntryGroup methods that accept a flags parameter, and repeated crashes can result in persistent service disruption if the daemon is automatically restarted.
Remediation
Install update from vendor's website.