What’s Vulnerable › Vulnerabilities

CVE-2021-30500

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-27 · updated 2026-06-17
• Weakness: CWE-476

Description

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.

Affected products

• Fedoraproject Fedora: 33
• Red Hat Enterprise Linux: 7.0
• upx: 4.0.0

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1948692
• https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc
• https://github.com/upx/upx/issues/485
• https://bugzilla.redhat.com/show_bug.cgi?id=1948692
• https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc
• https://github.com/upx/upx/issues/485

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