CVE-2026-16730
Dbus-broker: dbus-broker: session bus denial of service via emfile during peer setup
Description
A flaw was found in dbus-broker. When the process file-descriptor limit is reached, EMFILE/ENFILE errors during peer setup (notably SO_PEERPIDFD) are handled as fatal failures, causing the broker to exit. A local attacker who can open many connections to the user session bus can trigger this and deny service to the desktop session. Flatpak applications can reach the host session bus through the dbus proxy.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:LAttack VectorLocal
AC:LAttack ComplexityLow
PR:LPrivileges RequiredLow
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:NIntegrityNone
A:HAvailabilityHigh
Weaknesses
Affected Products
Red Hat
commercial·US
and 1 more affected products View all →
Exploitability
Workaround Available
References
https://access.redhat.com/errata/RHSA-2026:61340
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:61355
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:66018
access.redhat.com
and 3 more references View all →
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