EUVD-2026-16557
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Lifecycle Timeline
4Description
A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations.
Analysis
Firewalld on Red Hat Enterprise Linux 7, 8, 9, and 10, as well as OpenShift Container Platform 4, contains an authentication bypass vulnerability in two D-Bus setters (setZoneSettings2 and setPolicySettings) that allows local unprivileged users to modify runtime firewall configurations without proper authorization. An authenticated local attacker can exploit this to change network security policies, potentially enabling lateral movement or service disruption. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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External POC / Exploit Code
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