PatchTheCVECVE-2026-81883: radare2 is a UNIX-like reverse engineering framework and command-line toolset
CVE-2026-81883 is a low-severity flaw (CVSS 3.3) affecting radare2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 in
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 3.3 (Low) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.2% (top 95%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2026-09-22 |
| Last modified | 2026-09-28 |
Last updated 2026-09-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-81883?
radare2: upgrade to 6.2.0. Exact commands for each OS are on this page.
Is CVE-2026-81883 being exploited?
CVE-2026-81883 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-81883 affect?
CVE-2026-81883 affects radare2. Severity is low (CVSS 3.3). 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 immedi
How urgent is CVE-2026-81883?
Priority 18/100. Public exploit reference
Related CVEs
- CVE-2026-14757 MEDIUM 5.3 UPGRADE A vulnerability was determined in radareorg radare2 up to 6.1.6
- CVE-2026-14759 LOW 3.3 UPGRADE A security flaw has been discovered in radareorg radare2 up to 6.1.6
- CVE-2026-14789 LOW 3.3 UPGRADE A vulnerability was detected in radareorg radare2 up to 6.1.6
- CVE-2026-14758 LOW 3.3 UPGRADE A vulnerability was identified in radareorg radare2 up to 6.1.6
- CVE-2026-14760 LOW 3.3 UPGRADE A weakness has been identified in radareorg radare2 up to 6.1.6