CVE-2026-39959CWE-290CWE-770

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

High · published April 9, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
2.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00132 · 2.5th percentile
Weaknesses
CWE-290 · Authentication Bypass by Spoofing; CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-04-09T16:29Z
EPSS history
Timeline
  • 09 APR 16:29Z
    Tmds.DBus: malicious D-Bus peers can spoof signals, exhaust file descriptor resources, and cause denial of service
    cvelistv5