ESS dissector crash in Wireshark 4.4.0-4.4.17/4.6.0-4.6.7 DoS
CVE-2026-76919 Published on August 19, 2026
Use of Uninitialized Variable in Wireshark
ESS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Vulnerability Analysis
CVE-2026-76919 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.
Weakness Type
Use of Uninitialized Variable
The code uses a variable that has not been initialized, leading to unpredictable or unintended results. In some languages such as C and C++, stack variables are not initialized by default. They generally contain junk data with the contents of stack memory before the function was invoked. An attacker can sometimes control or read these contents. In other languages or conditions, a variable that is not explicitly initialized can be given a default value that has security implications, depending on the logic of the program. The presence of an uninitialized variable can sometimes indicate a typographic error in the code.
Products Associated with CVE-2026-76919
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Affected Versions
Wireshark Foundation Wireshark:- Version 4.6.0 and below 4.6.8 is affected.
- Version 4.4.0 and below 4.4.18 is affected.