CVE-2006-4336: Gzip

High severity, CVSS 7.5. EPSS: 5.9% chance of exploitation in the next 30 days.

Buffer underflow in the build_tree function in unpack.c in gzip 1.3.5 allows context-dependent attackers to execute arbitrary code via a crafted leaf count table that causes a write to a negative index.

Affected products

• Gzip Gzip: version 1.3.5 only

Published 2006-09-19. Last modified 2026-06-16.