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CVE-2025-68471— Avahi has a reachable assertion in lookup_start

Quick assessment

Affected
avahi avahi
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Avahi是Avahi开源的一套用于Linux的本地服务发现工具。 Avahi 0.9-rc2及之前版本存在安全漏洞，该漏洞源于相隔2秒发送2个包含CNAME资源记录的未经请求公告，可能导致avahi-daemon崩溃。

CVSS 6.5 · Medium EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2025-68471

Vulnerability Information
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Vulnerability Title
Avahi has a reachable assertion in lookup_start
Source: CVE Program / CVE List V5
Vulnerability Description
Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In 0.9-rc2 and earlier, avahi-daemon can be crashed by sending 2 unsolicited announcements with CNAME resource records 2 seconds apart.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5
Vulnerability Title
Avahi 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Avahi是Avahi开源的一套用于Linux的本地服务发现工具。 Avahi 0.9-rc2及之前版本存在安全漏洞，该漏洞源于相隔2秒发送2个包含CNAME资源记录的未经请求公告，可能导致avahi-daemon崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
avahi avahi <= 0.9-rc2 -

II. Public POCs for CVE-2025-68471

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III. Intelligence Information for CVE-2025-68471

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Same Patch Batch · avahi · 2026-01-12 · 3 CVEs total

CVE-2025-68468 6.5 MEDIUM Avahi has a reachable assertion in lookup_multicast_callback
CVE-2025-68276 5.5 MEDIUM Avahi has a reachable assertion in avahi_wide_area_scan_cache

IV. Related Vulnerabilities

Same product: avahi
Same vendor: avahi
Same weakness: CWE-617

V. Comments for CVE-2025-68471

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