canUnpack in p_vmlinx.cpp in UPX 3.95 allows remote attackers to cause a denial of service (SEGV or buffer overflow, and application crash) or possibly have unspecified other impact via a crafted UPX packed file.
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T52JATXV6NTPTMGXCRGT37H6KXERYNZN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MOCJ43HTM45GZCAQ2FLEBDNBM76V22RG/
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.html
https://github.com/upx/upx/issues/287
Source: Mitre, NVD
Published: 2019-07-27
Updated: 2025-04-11
Base Score: 6.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 7.8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.00545