{"id":"CVE-2026-81883","summary":"radare2: Out-of-bounds Read at the end of string in the LUA 5.3 bytecode","details":"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.","aliases":["GHSA-96m5-hvwp-674c"],"modified":"2026-09-25T08:24:06.247731Z","published":"2026-09-22T15:14:47.022Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81883.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-125"]},"references":[{"type":"WEB","url":"https://github.com/radareorg/radare2/releases/tag/6.2.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81883.json"},{"type":"ADVISORY","url":"https://github.com/radareorg/radare2/security/advisories/GHSA-96m5-hvwp-674c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81883"},{"type":"REPORT","url":"https://github.com/radareorg/radare2/issues/26228"},{"type":"FIX","url":"https://github.com/radareorg/radare2/commit/26c2eac360033458e9d266e5e30667d1f8d642e3"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/radareorg/radare2","events":[{"introduced":"0"},{"fixed":"26c2eac360033458e9d266e5e30667d1f8d642e3"},{"fixed":"e1fc278734ad62f933fc6f91edb29e4ba732f402"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"6.2.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["6.1.8","6.1.6","6.1.4","6.1.2","6.1.0","6.0.8","6.0.7","6.0.6","6.0.4","6.0.2","6.0.0","5.9.8","5.9.6","5.9.4","5.9.2","5.9.0","5.8.8","5.8.6","5.8.4","5.8.2","5.8.0","5.7.8","5.7.6","5.7.4","5.7.2","5.7.0","wip","5.6.8","5.6.6","5.6.4","5.6.2","5.6.0","5.5.4","5.5.2","5.5.0","5.4.2","5.4.0","5.4.0-git","5.3.1","5.3.0","5.2.1","5.2.0","5.1.1","5.1.0","release-5.0.0","5.0.0","4.5.1","4.4.0","4.3.1","Continuous-Windows","4.3.0","continuous","4.2.1","4.2.0","4.1.1","4.1.0","4.0.0","3.9.0","3.8.0","3.7.1","3.7.0","3.6.0","3.5.1","3.5.0","3.4.1","3.4.0","3.3.0","3.2.1","3.2.0","3.1.3","3.1.2","3.1.1","3.1.0","3.0.1","3.0.0","2.9.0","2.8.0","2.7.0","2.6.9","2.6.0","2.5.0","2.4.0","2.2.0","2.1.0","2.0.1","2.0.0","1.6.0","1.5.0","1.4.0","1.3.0","1.3.0-git","1.2.0","1.2.0-git","1.1.0","1.0.2","1.0.1","1.0.0","1.0","0.10.6","0.10.5","0.10.4-termux4","termux","0.10.4","0.10.3","0.10.2","0.10.1","0.10.0","radare2-windows-nightly","0.9.9","0.9.8","0.9.8-rc4","0.9.8-rc3","0.9.8-rc2","0.9.8-rc1","0.9.7","0.9.6","0.9.4","0.9.2","0.9","0.8.8","0.8.6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81883.json","vanir_signatures_modified":"2026-09-25T08:24:06Z","vanir_signatures":[{"source":"https://github.com/radareorg/radare2/commit/26c2eac360033458e9d266e5e30667d1f8d642e3","target":{"file":"libr/bin/format/lua/lua.c","function":"lua53parseFunction"},"deprecated":false,"digest":{"function_hash":"88813128786502877480995414348781267443","length":2685},"id":"CVE-2026-81883-219bc786","signature_type":"Function","signature_version":"v1"},{"signature_type":"Line","signature_version":"v1","source":"https://github.com/radareorg/radare2/commit/26c2eac360033458e9d266e5e30667d1f8d642e3","target":{"file":"libr/bin/format/lua/lua.c"},"deprecated":false,"digest":{"line_hashes":["97281731534988022195761506325820041129","140060395005531248709477678621622325818","62959465794815688041136842110098149805","231183345651814163341419737057238732559","192389528011561717209268003354426092216","260661482793239044655224904127795230054","270715067591010131606712070159926213473","27567618119958805393762998454053934827","176561817106027157751524138588692811124","304149718349571851964985182712710429663","178619029799886523076829665371130677280","231183345651814163341419737057238732559","225942904298752586441781191334244115206","236493813222167216913636342678684300887","82363497290657257578190770290382409004","84183812391959972098891284107225975560","154749837732141788212620510855110568430","157015736461577161155744872917161487710","231183345651814163341419737057238732559","185602589844584869329473121125131954719","140537124039914541700397857928529337679","336639376182564242353932543828328628498","335029874234159221934744697391962460284","6414103377676371644918401372246687358","33522283271567754928102736799666675195","231183345651814163341419737057238732559","288029404338626140819327551746194557768","66848983366596859733397264906749018052","24139697413545650703802642757272299252","221545293187243653579787666816612143811","338321884345777618720418594571476864366","66645056954162476463792707813430013862","231183345651814163341419737057238732559","44854276324870498599675265765746053394","100612716329139136481206801634891668722","53681145297720595341982176037450039034","107540521382467662356297096602359812652","236004924389456760078368607771313172500","231183345651814163341419737057238732559","36650638506775718766036598341830141840","308010621248350100418277529564109310850","97156973595993161770697621786399137605","281529209788473691321358283905624021324"],"threshold":0.9},"id":"CVE-2026-81883-e8c41b78"}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S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