What’s Vulnerable › Vulnerabilities

CVE-2019-20805

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-01 · updated 2026-06-17
• Weakness: CWE-190

Description

p_lx_elf.cpp in UPX before 3.96 has an integer overflow during unpacking via crafted values in a PT_DYNAMIC segment.

Affected products

• upx: before 3.96 — fixed in 3.96

How to fix

Upgrade to a fixed version: upx 3.96. Check the vendor advisory for mitigations.

References

• https://github.com/upx/upx/commit/8be9da8280dfa69d5df4417d4d81bda1cab78010
• https://github.com/upx/upx/issues/317
• https://github.com/upx/upx/commit/8be9da8280dfa69d5df4417d4d81bda1cab78010
• https://github.com/upx/upx/issues/317

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