What’s Vulnerable › Vulnerabilities

CVE-2021-43316

• Severity: high (CVSS 7.5 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: yes
• Published: 2023-03-24 · updated 2026-06-17
• Weakness: CWE-119

Description

A heap-based buffer overflow was discovered in upx, during the generic pointer 'p' points to an inaccessible address in func get_le64().

Affected products

• upx: before 4.0.0 — fixed in 4.0.0

How to fix

Upgrade to a fixed version: upx 4.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/upx/upx/issues/381
• https://github.com/upx/upx/issues/381

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