{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/dbus/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":7.1,"id":"CVE-2026-39959"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["high"],"_cs_tags":["dbus","vulnerability","dotnet"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eTmds.DBus is a .NET library used for interacting with the D-Bus inter-process communication system. A vulnerability exists in versions prior to 0.92.0 for Tmds.DBus and 0.92.0 and 0.21.3 for Tmds.DBus.Protocol, allowing a malicious D-Bus peer on the same bus to perform several malicious actions. These include spoofing signals by impersonating the owner of a well-known name, exhausting system resources by sending messages with an excessive number of Unix file descriptors, and crashing the application by sending malformed message bodies that cause unhandled exceptions on the SynchronizationContext. This vulnerability could lead to denial of service or potentially allow for further exploitation within the affected application\u0026rsquo;s context. Defenders need to ensure they are running patched versions of this software.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eA malicious actor gains access to the same D-Bus instance as the target application.\u003c/li\u003e\n\u003cli\u003eThe attacker identifies a well-known name that the target application utilizes.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious D-Bus message designed to impersonate the owner of the well-known name.\u003c/li\u003e\n\u003cli\u003eThe attacker sends this spoofed signal to the target application through the D-Bus.\u003c/li\u003e\n\u003cli\u003eAlternatively, the attacker crafts a D-Bus message with an excessive number of Unix file descriptors.\u003c/li\u003e\n\u003cli\u003eThe attacker sends the resource-intensive message, attempting to exhaust system resources.\u003c/li\u003e\n\u003cli\u003eOr the attacker crafts a malformed message body designed to cause an unhandled exception.\u003c/li\u003e\n\u003cli\u003eSuccessful exploitation leads to signal spoofing, resource exhaustion, or application crash, potentially leading to denial of service.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability allows a malicious actor to disrupt services that rely on Tmds.DBus. By spoofing signals, an attacker can manipulate the behavior of applications. By exhausting system resources or crashing applications, the attacker can cause denial of service. While the specific number of victims or sectors affected is not detailed, the potential impact is significant for systems using vulnerable versions of Tmds.DBus.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade Tmds.DBus to version 0.92.0 or later and Tmds.DBus.Protocol to version 0.92.0 or 0.21.3 or later to remediate CVE-2026-39959.\u003c/li\u003e\n\u003cli\u003eMonitor D-Bus traffic for suspicious patterns, such as messages with excessive file descriptors, by creating custom monitoring tools.\u003c/li\u003e\n\u003cli\u003eImplement application-level validation of D-Bus messages to prevent exploitation through malformed message bodies.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-09T17:16:30Z","date_published":"2026-04-09T17:16:30Z","id":"/briefs/2026-04-tmds-dbus-vuln/","summary":"Tmds.DBus and Tmds.DBus.Protocol are vulnerable to signal spoofing, resource exhaustion, and application crashes due to malformed messages from malicious D-Bus peers on the same bus.","title":"Tmds.DBus Vulnerability Allows Signal Spoofing and Resource Exhaustion","url":"https://feed.craftedsignal.io/briefs/2026-04-tmds-dbus-vuln/"}],"language":"en","title":"CraftedSignal Threat Feed — Dbus","version":"https://jsonfeed.org/version/1.1"}