CVE-2026-81883

CVE-2026-81883 · radare2: Out-of-bounds Read at the end of string in the LUA 5.3 bytecode

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 3.3 · Low · EPSS 0.2%

Published

2026-09-22T15:14:47.022Z

Updated

2026-09-22T16:11:40.440Z

Stack: system

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