Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

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

Quick assessment

Affected
radareorg radare2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 functi

CVSS 3.3 · Low
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-81883

Vulnerability Information

Shenlong is analyzing...

Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
radare2: Out-of-bounds Read at the end of string in the LUA 5.3 bytecode
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
radareorg radare2 < 6.2.0 -

II. Public POCs for CVE-2026-81883

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-81883

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-81883 (1)

Other References for CVE-2026-81883 (3)

Same Patch Batch · radareorg · 2026-09-22 · 9 CVEs total

CVE-2026-81885 5.5 MEDIUM radare2: Infinite relocation-chain loop causes denial of service in radare2 NE parser
CVE-2026-81879 5.5 MEDIUM radare2: Heap out-of-bounds read in radare2 ELF PN_XNUM handling
CVE-2026-81880 5.5 MEDIUM radare2: Uncontrolled resource consumption in radare2 PEF loader
CVE-2026-81878 5.5 MEDIUM radare2: Integer overflow causes heap out-of-bounds write in radare2 PYC parser
CVE-2026-81886 5.5 MEDIUM radare2: Uncontrolled memory allocation in radare2 dmp64 parser
CVE-2026-81882 3.3 LOW radare2: Missing string termination causes heap out-of-bounds read in radare2 bplist parse
CVE-2026-81881 3.3 LOW radare2: Heap out-of-bounds read in radare2 Mach-O Swift metadata parser
CVE-2026-81884 2.5 LOW radare2: Heap out-of-bounds read in radare2 Mach-O LC_DATA_IN_CODE parser

IV. Related Vulnerabilities

Same product: radare2
Same vendor: radareorg
Same weakness: CWE-125

V. Comments for CVE-2026-81883

No comments yet

Leave a comment