What’s Vulnerable › Vulnerabilities

CVE-2018-20455

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-12-25 · updated 2026-06-17
• Weakness: CWE-787

Description

In radare2 prior to 3.1.1, the parseOperand function inside libr/asm/p/asm_x86_nz.c may allow attackers to cause a denial of service (application crash via a stack-based buffer overflow) by crafting an input file, a related issue to CVE-2018-20456.

Affected products

• radareorg/radare2: before 3.1.1 — fixed in 3.1.1

How to fix

Upgrade to a fixed version: radareorg/radare2 3.1.1. Check the vendor advisory for mitigations.

References

• https://github.com/radare/radare2/commit/9b46d38dd3c4de6048a488b655c7319f845af185
• https://github.com/radare/radare2/issues/12373
• https://github.com/radare/radare2/commit/9b46d38dd3c4de6048a488b655c7319f845af185
• https://github.com/radare/radare2/issues/12373

Get alerted when CVE-2018-20455 or the next vulnerability affects your stack