CVE-2020-27787: Upx

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A Segmentaation fault was found in UPX in invert_pt_dynamic() function in p_lx_elf.cpp. An attacker with a crafted input file allows invalid memory address access that could lead to a denial of service.

Affected products

• Upx Upx: before 3.96 (fixed in 3.96)

Published 2022-08-18. Last modified 2026-06-17.