CVE-2025-59529: simple protocol server ignores accepts unlimited connections and logs failures without limit

Overview

Severity

Medium (CVSS 5.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2025-Dec

Released

2025-12-21

Last Updated

2026-02-18

EPSS Score

0.03% (percentile: 8.4%)

Affected Products (5)

Open Source Software

• cbl2 avahi 0.8-4 on CBL Mariner 2.0

Mariner

• azl3 avahi 0.8-5 on Azure Linux 3.0

Other

• 20826-17084
• 20861-17086
• 20862-17084

Revision History

• 2025-12-21: Information published.
• 2025-12-23: Information published.
• 2026-01-20: Information published.
• 2026-02-18: Information published.