CVE-2021-32495: radare radare2 Use After Free

Vulnerability summary

CVE-2021-32495 is a critical (CVSS 10.0) Use After Free vulnerability in radare radare2. EPSS estimates a 0.77% chance of exploitation in the next 30 days, higher than 54.8% of scored vulnerabilities.

Timeline

1. 07-07-2023
   PublishedVulnerability first disclosed.
2. 12-11-2024
   Last modifiedVulnerability information updated.

Description

Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory afterwards. This will allow attackers to cause denial of service.

• CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.