CVE-2026-81883: Radare RADARE2

Low severity, CVSS 3.3. EPSS: 0.2% chance of exploitation in the next 30 days.

radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Lua 5.3 bytecode function parser was vulnerable because the Lua 5.3 bytecode function parser read fixed function-metadata fields immediately after a function-name string without checking the remaining buffer length. The vulnerability is triggered by opening or inspecting a crafted Lua 5.3 bytecode file whose function-name string ends at the input-buffer boundary. The parser read two integers and three one-byte fields beyond the allocated input buffer. This can cause invalid parser results or process termination; no attacker-observable memory disclosure has been demonstrated. This issue is fixed in version 6.2.0.

Affected products

• Radare RADARE2: before 6.2.0 (fixed in 6.2.0)

Published 2026-09-22. Last modified 2026-09-28.