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High · 7.1 CVE-2026-39959 EUVD-2026-20964GHSA-xrw6-gwf8-vvr9

Tmds.DBus: malicious D-Bus peers can spoof signals, exhaust file descriptor resources, and cause denial of service

Published Apr 9, 2026 · Updated Apr 9, 2026 · Assigned by GitHub_M

Description

Tmds.DBus provides .NET libraries for working with D-Bus from .NET. Tmds.DBus and Tmds.DBus.Protocol are vulnerable to malicious D-Bus peers. A peer on the same bus can spoof signals by impersonating the owner of a well-known name, exhaust system resources or cause file descriptor spillover by sending messages with an excessive number of Unix file descriptors, and crash the application by sending malformed message bodies that cause unhandled exceptions on the SynchronizationContext. This vulnerability is fixed in Tmds.DBus 0.92.0 and Tmds.DBus.Protocol 0.92.0 and 0.21.3.

Affected products

VendorProductAffectedFixed
tmds Tmds.DBus < 0.92.0 —
tmds Tmds.DBus.Protocol < 0.21.3, >= 0.22.0, < 0.92.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
NuGet Tmds.DBus < 0.92.0 0.92.0 GHSA-xrw6-gwf8-vvr9
NuGet Tmds.DBus.Protocol < 0.21.3 0.21.3 GHSA-xrw6-gwf8-vvr9
NuGet Tmds.DBus.Protocol >= 0.22.0, < 0.92.0 0.92.0 GHSA-xrw6-gwf8-vvr9

References