CVE-2007-3123: Clam Anti-Virus Clamav

Medium severity, CVSS 5.0. EPSS: 2.5% chance of exploitation in the next 30 days.

unrar.c in libclamav in ClamAV before 0.90.3 and 0.91 before 0.91rc1 allows remote attackers to cause a denial of service (core dump) via a crafted RAR file with a modified vm_codesize value, which triggers a heap-based buffer overflow.

Affected products

• Clam Anti-Virus Clamav: version 0.90 only; version 0.90.1 only; version 0.90.2 only; version 0.90_rc1.1 only; version 0.90_rc2 only; version 0.90_rc3 only

Published 2007-06-07. Last modified 2026-06-16.