CVE-2023-23456EPSS p31.8%

CVE-2023-23456CVE-2023-23456

upx / upx

Description

A heap-based buffer overflow issue was discovered in UPX in PackTmt::pack() in p_tmt.cpp file. The flow allows an attacker to cause a denial of service (abort) via a crafted file.

Scoring

CVSS 5.3 ()
VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
EPSS0.39% probability of exploitation · percentile 31.8% · 2026-08-03T12:00:16Z
Last modified2026-06-17
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.