Reachable assertion in Avahi - CVE-2026-59987
Published: July 12, 2026
Vulnerability identifier: #VU137340
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59987
CWE-ID: CWE-617
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to reachable assertion in dbus_prepare_record_browser_object when handling a D-Bus RecordBrowserNew method call with a crafted name that passes validation but cannot be normalized. A local user can send a specially crafted D-Bus method call to cause a denial of service.
Affected software
Avahi
How to mitigate CVE-2026-59987
Install security update from vendor's website.
Avahi - update to 0.9 rc5