CVE-2021-30500
Fixed in a distro release EPSS 1%
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.
Products: upx, redhat enterprise_linux, fedoraproject fedora
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Arch Linux | upx | no fix |
| Debian 13 | upx-ucl | 4.2.2-1 |
| Debian 14 | upx-ucl | 4.2.2-1 |
| SUSE Package Hub 15 SP4 | upx | 4.0.2-bp154.4.6.1 |
| Ubuntu 16.04 LTS | upx-ucl | no fix |
| Ubuntu 18.04 LTS | upx-ucl | no fix |
| Ubuntu 20.04 LTS | upx-ucl | no fix |
| Ubuntu 22.04 LTS | upx-ucl | no fix |
| Ubuntu 24.04 LTS | upx-ucl | no fix |
| Ubuntu 25.10 | upx-ucl | no fix |
| Ubuntu 26.04 LTS | upx-ucl | no fix |
| Ubuntu 26.10 | upx-ucl | no fix |
| openSUSE Leap 15.4 | upx | 4.0.2-bp154.4.6.1 |