RLSA-2026:98530: Important: xdg-dbus-proxy security update
xdg-dbus-proxy is a filtering proxy for D-Bus connections. It was originally part of the flatpak project, but it has been broken out as a standalone module to facilitate using it in other contexts.
Security Fix(es):
xdg-dbus-proxy: xdg-dbus-proxy: message filtering bypass via reply serial allows sandbox escape (CVE-2026-94422)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
rocky-linux/xdg-dbus-proxyto a version that resolves this vulnerability.Fixed in 0:0.1.3-1.el9_8.1
Event History
Frequently Asked Questions
What does an attacker need to exploit this issue?
The CVSS vector indicates network attack access, low attack complexity, no privileges required, and user interaction is required. The described impact is a sandbox escape through a message-filtering bypass involving reply serials.
What is the potential impact if exploitation succeeds?
Successful exploitation may allow a sandbox escape. The advisory rates confidentiality, integrity, and availability impact as high.
Which Rocky Linux component should be checked for exposure?
Check systems that have the rocky-linux/xdg-dbus-proxy package installed, particularly where it is used to filter D-Bus connections for sandboxed applications or other contexts.