CVE-2025-68276 Avahi has a reachable assertion in avahi_wide_area_scan_cache
An unprivileged local user can crash the Avahi daemon by creating specific record browsers via D-Bus, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-68276?
CVE-2025-68276 is a medium-severity denial of service vulnerability in avahi, published on 12 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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, an unprivileged local users can crash avahi-daemon (with wide-area disabled) by creating record browsers with the AVAHI_LOOKUP_USE_WIDE_AREA flag set via D-Bus. This can be done by either calling the RecordBrowserNew method directly or creating hostname/address/service resolvers/browsers that create those browsers internally themselves.
Weakness: CWE-617
Which versions are affected by CVE-2025-68276?
It affects 1 product.
Products include Avahi Avahi.
How do I fix CVE-2025-68276?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-68276 being exploited?
There is no known exploitation of CVE-2025-68276 in the wild and no public exploit code.
Other vulnerabilities in avahi
Sources
Also known as ALPINE-CVE-2025-68276, AZL-74271, AZL-74285, BELL-CVE-2025-68276, DEBIAN-CVE-2025-68276, ECHO-abcc-913b-5cbc and 6 more.