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35 changes: 35 additions & 0 deletions rubies/mruby/CVE-2025-7207.yml
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---
engine: mruby
cve: 2025-7207
ghsa: 48pr-6hvf-39v3
url: https://nvd.nist.gov/vuln/detail/CVE-2025-7207
title: Heap-based buffer overflow vulnerability in mruby 3.4.0-rc2
date: 2025-07-08
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.
cvss_v2: 1.7
cvss_v3: 5.5
cvss_v4: 4.4
notes: |
- Found Issue #6509 listed in **unreleased** mruby 3.5 NEWS.md
file listed below.
- Not patched - mruby 3.5.0 has not been released as of 2026/02/07.
related:
url:
- https://nvd.nist.gov/vuln/detail/CVE-2025-7207
- https://github.com/mruby/mruby/blob/master/NEWS.md
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The old URL is still there.

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The fix is only in master.

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We already link to https://github.com/mruby/mruby/blob/6f321251785c2396cb7e6a576ac2080c1adb4491/NEWS.md above which is a commit in the master branch, so linking directly to the NEWS.md in the master branch is a duplicate URL. We shouldn't link to the same file twice.

- https://github.com/mruby/mruby/commit/1fdd96104180cc0fb5d3cb086b05ab6458911bb9
- https://github.com/mruby/mruby/issues/6509#event-17145516649
- https://github.com/mruby/mruby/issues/6509
- https://vuldb.com/?ctiid.315156
- https://vuldb.com/?id.315156
- https://vuldb.com/?submit.607683
- https://www.wiz.io/vulnerability-database/cve/cve-2025-7207
- https://github.com/advisories/GHSA-48pr-6hvf-39v3