CVE-2025-59529
avahi: simple clients denial-of-service
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 11, 2025
Updated · September 10, 2026
Description
A flaw was found in avahi. The simple protocol server ignores the documented client limit and accepts unlimited connections, allowing for easy local Denial of Service.
Statement
Moderate: This flaw in the Avahi simple protocol server allows a local attacker to exhaust system resources by establishing an unlimited number of connections, leading to a denial of service. This impact is confined to systems where Avahi is active and accessible to local users.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-770 · Allocation of Resources Without Limits or Throttling