Vulnerability · Published Apr 9, 2026 · Assigned by GitHub_M
CVE-2026-39959Tmds.DBus: malicious D-Bus peers can spoof signals, exhaust file descriptor resources, and cause denial of service
High 7.1
In plain English
A high-severity resource allocation without limits in Tmds.DBus from tmds. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | tmds.dbus | 0.92.0 | GHSA-xrw6-gwf8-vvr9 |
| NuGet | tmds.dbus.protocol | 0.21.3 | GHSA-xrw6-gwf8-vvr9 |
| NuGet | tmds.dbus.protocol | 0.92.0 | GHSA-xrw6-gwf8-vvr9 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| tmds | Tmds.DBus | < 0.92.0 |
| tmds | Tmds.DBus.Protocol | < 0.21.3>= 0.22.0, < 0.92.0 |
Weakness: CWE-770, CWE-290 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
References
- https://github.com/tmds/Tmds.DBus/security/advisories/GHSA-xrw6-gwf8-vvr9 x_refsource_CONFIRM