CVE catalog
CVE-2021-30500
DEBIAN-CVE-2021-30500
- Severity
- High · CVSS 7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 1.23% · Oct 25, 2026
Null pointer dereference was found in upx PackLinuxElf::canUnpack() in p_lx_elf.cpp,in version UPX 4.0.0. That allow attackers to execute arbitrary code and cause a denial of service via a crafted file.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | upx-ucl | 13 | 4.2.2-1 | fixed |
| Debian | upx-ucl | 14 | 4.2.2-1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | upx-ucl | deb | 13 | 4.2.2-1 | Not reported | DEBIAN-CVE-2021-30500 | Not reported |
| Debian | upx-ucl | deb | 14 | 4.2.2-1 | Not reported | DEBIAN-CVE-2021-30500 | Not reported |
OpenFactory catalog packages
[Debian 13 (Trixie)]
- [upx-ucl]Fixed
Details (2)
4.2.4-1.1· amd64 · trixieFixed · Fixed:
4.2.2-1pypi · upx-ucl · debian · 13
4.2.4-1.1· arm64 · trixieFixed · Fixed:
4.2.2-1pypi · upx-ucl · debian · 13
Observed: