Name: CVE-2021-30501: Improper Input Validation
Creator: Rapid7
Published: 2021-05-26T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-30501, CWE-20, CWE-617, CVSS 5.5, EPSS 0.01041

An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.0. The flow allows attackers to cause a denial of service (abort) via a crafted file.

CVSS Details

CVSS 3.1 Base Score: 5.5
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade upx	Aug 22, 2024	May 26, 2021
Arch Linux	—	Upgrade to the latest version of Arch Linux	Jul 11, 2025	May 26, 2021
Debian	—	No solution existsUpgrade upx-ucl	May 15, 2025	May 27, 2021
Suse	—	Upgrade upx	Apr 12, 2023	May 27, 2021

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CVSS Details

Covered by Rapid7

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