{"id":"CVE-2026-81883","title":"radare2 is a UNIX-like reverse engineering framework and command-line toolset","summary":"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 imm…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cwe":["CWE-125"],"vendor":"radareorg","product":"radare2","affected":["radare2 < 6.2.0"],"published":"2026-09-22","updated":"2026-09-23","sourceUpdated":"2026-09-23T18:21:42.327","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81883","references":[{"url":"https://github.com/radareorg/radare2/commit/26c2eac360033458e9d266e5e30667d1f8d642e3","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/issues/26228","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/releases/tag/6.2.0","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/security/advisories/GHSA-96m5-hvwp-674c","label":"security-advisories@github.com"},{"url":"https://github.com/radareorg/radare2/issues/26228","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00168,"epssPercentile":0.05315,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-22T16:11:00.525508Z"},"ingestedAt":"2026-09-22T16:06:00.499Z","slug":"CVE-2026-81883","body":"## Overview\n\nradare2 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":30,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":209213,"id":"CVE-2026-81883","ts":1790096883466,"field":"exploit_available","old":"false","new":"true"}]}