CVE-2026-81883

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.

• https://github.com/radareorg/radare2/commit/26c2eac360033458e9d266e5e30667d1f8d642e3Patch
• https://github.com/radareorg/radare2/issues/26228Exploit
• https://github.com/radareorg/radare2/releases/tag/6.2.0Release Notes
• https://github.com/radareorg/radare2/security/advisories/GHSA-96m5-hvwp-674cPatch
• https://github.com/radareorg/radare2/issues/26228Exploit