CVE-2011-2174: Wireshark

Medium severity, CVSS 4.3. EPSS: 2% chance of exploitation in the next 30 days.

Double free vulnerability in the tvb_uncompress function in epan/tvbuff.c in Wireshark 1.2.x before 1.2.17 and 1.4.x before 1.4.7 allows remote attackers to cause a denial of service (application crash) via a packet with malformed data that uses zlib compression.

Affected products

• Wireshark Wireshark: version 1.2 only; version 1.2.0 only; version 1.2.1 only; version 1.2.2 only; version 1.2.3 only; version 1.2.4 only; …

Published 2011-06-06. Last modified 2026-06-16.