CVE-2018-14340: Debian Linux

High severity, CVSS 7.5. EPSS: 3.5% chance of exploitation in the next 30 days.

In Wireshark 2.6.0 to 2.6.1, 2.4.0 to 2.4.7, and 2.2.0 to 2.2.15, dissectors that support zlib decompression could crash. This was addressed in epan/tvbuff_zlib.c by rejecting negative lengths to avoid a buffer over-read.

Affected products

• Debian Debian Linux: version 8.0 only
• Wireshark Wireshark: from 2.2.0, up to and including 2.2.15; from 2.4.0, up to and including 2.4.7; from 2.6.0, up to and including 2.6.1

Published 2018-07-19. Last modified 2026-06-17.