CVE-2020-27793 Integer overflow in radare2

What is CVE-2020-27793?

CVE-2020-27793 is a high-severity vulnerability in Radare Radare2, published on 19 Aug 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.

Weakness: CWE-193

Which versions are affected by CVE-2020-27793?

It affects 1 product.

Products include Radare Radare2.

How do I fix CVE-2020-27793?

No fix has been published for CVE-2020-27793 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-27793 being exploited?

There is no known exploitation of CVE-2020-27793 in the wild and no public exploit code.

Other vulnerabilities in Radare Radare2

• CVE-2025-1864 Buffer Overflow and Potential Code Execution in Radare2 Critical 10.0
• CVE-2025-1744 Out-of-bounds Write in radare2 Critical 10.0
• CVE-2021-32494 Denial of service in radare2 Critical 10.0
• CVE-2021-32495 Use after free in radare2 Critical 10.0
• CVE-2024-29646 Memory corruption in n/a Critical 9.8

All Radare Radare2 vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wq2p-x6v8-v53j, UBUNTU-CVE-2020-27793.