CVE-2021-43314: Upx

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

A heap-based buffer overflows was discovered in upx, during the generic pointer 'p' points to an inaccessible address in func get_le32(). The problem is essentially caused in PackLinuxElf32::elf_lookup() at p_lx_elf.cpp:5368

Affected products

• Upx Upx: before 4.0.0 (fixed in 4.0.0)

Published 2023-03-24. Last modified 2026-06-17.