What’s Vulnerable › Vulnerabilities

CVE-2023-38473: Reachable assertion in avahi_alternative_host_name

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-02 · updated 2026-10-28
• Weakness: CWE-617

Description

A vulnerability was found in Avahi. A reachable assertion exists in the avahi_alternative_host_name() function.

Affected products

• avahi: before 0.9 — fixed in 0.9
• Red Hat Enterprise Linux: 8.0, 9.0 (and their updates)
• avahi: before 0.9-rc1 — fixed in 0.9-rc1
• Fedora: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions

How to fix

Upgrade to a fixed version: avahi 0.9; avahi 0.9-rc1. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2023-38473
• https://bugzilla.redhat.com/show_bug.cgi?id=2191694
• https://access.redhat.com/security/cve/CVE-2023-38473
• https://bugzilla.redhat.com/show_bug.cgi?id=2191694
• https://lists.debian.org/debian-lts-announce/2024/12/msg00011.html

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