CVE-2020-27788: Upx

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

An out-of-bounds read access vulnerability was discovered in UPX in PackLinuxElf64::canPack() function of p_lx_elf.cpp file. An attacker with a crafted input file could trigger this issue that could cause a crash leading 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.