Description
A vulnerability, which was classified as problematic, was found in mruby up to 3.4.0-rc2. Affected is the function scope_new of the file mrbgems/mruby-compiler/core/codegen.c of the component nregs Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is 1fdd96104180cc0fb5d3cb086b05ab6458911bb9. It is recommended to apply a patch to fix this issue.
References (7)
Core 7
Core References
Third Party Advisory, VDB Entry vdb-entry
technical-description
https://vuldb.com/?id.315156
Permissions Required, VDB Entry signature
permissions-required
https://vuldb.com/?ctiid.315156
Third Party Advisory, VDB Entry third-party-advisory
https://vuldb.com/?submit.607683
Exploit, Issue Tracking issue-tracking
https://github.com/mruby/mruby/issues/6509
Exploit, Issue Tracking issue-tracking
https://github.com/mruby/mruby/issues/6509#event-17145516649
Scores
CVSS v3
3.3
EPSS
0.0004
EPSS Percentile
12.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-119
CWE-122
CWE-787
Status
published
Products (2)
mruby/mruby
3.4.0 rc (2 CPE variants)
mruby/mruby
< 3.4.0
Published
Jul 09, 2025
Tracked Since
Feb 18, 2026