CVE-2026-39959

HIGH

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

Title source: cna

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.

References (1)

[X_Refsource_Confirm] https://github.com/tmds/Tmds.DBus/security/advisories/GHSA-xrw6-gwf8-vvr9

Scores

CVSS v3 7.1

EPSS 0.0001

EPSS Percentile 2.3%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Details

CWE

CWE-290 CWE-770

Status published

Products (5)

nuget/Tmds.DBus 0 - 0.92.0NuGet

nuget/Tmds.DBus.Protocol 0 - 0.21.3NuGet

tmds/Tmds.DBus < 0.92.0

tmds/Tmds.DBus.Protocol < 0.21.3

tmds/Tmds.DBus.Protocol >= 0.22.0, < 0.92.0

Published Apr 09, 2026

Tracked Since Apr 09, 2026