Mruby: Use-of-uninitialized-value in mrb_bint_as_int
Description
A use-of-uninitialized-value vulnerability was reported in mruby, identified by OSS-Fuzz. The issue occurs in the function mrb_bint_as_int and related call stack functions. Multiple release candidate and stable versions of mruby are affected. No CVSS score or detailed impact information is provided. There is no indication of known exploits in the wild or available patches.
Affected software
pkg:generic/mrubyRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability is a use-of-uninitialized-value detected by OSS-Fuzz in the mruby project, specifically in the mrb_bint_as_int function and its call chain including mrb_ensure_int_type and mrb_get_args. This type of flaw can lead to undefined behavior during execution, potentially causing crashes or incorrect program behavior. The affected versions include various release candidates and stable releases from 3.2.0-rc through 4.1.0-rc. No official patch or remediation details are provided in the available data.
Potential Impact
The impact is potentially a program crash or undefined behavior due to use of uninitialized memory values. No further details on exploitation or data compromise are provided. There are no known exploits in the wild according to the input data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided. Users should monitor the mruby project and OSS-Fuzz reports for updates and apply patches once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- OSV-2022-599
- Osv Schema Version
- 1.2.0
- Ecosystems
- ["OSS-Fuzz"]
Threat ID: 6a9af33facd9273b49e1cb94
Added to database: 09/04/2026, 16:35:11 UTC
Last enriched: 09/07/2026, 15:23:18 UTC
Last updated: 10/04/2026, 07:32:27 UTC
Views: 139
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