CVE catalog
CVE-2025-12875
mruby: CVE-2025-12875
- Severity
- Low · CVSS 1.9
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.17% · Oct 25, 2026
A weakness has been identified in mruby 3.4.0. This vulnerability affects the function ary_fill_exec of the file mrbgems/mruby-array-ext/src/array.c. Executing a manipulation of the argument start/length can lead to out-of-bounds write. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. This patch is called 93619f06dd378db6766666b30c08978311c7ec94. It is best practice to apply a patch to resolve this issue.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | mruby | sid | 4.0.0-1 | not affected |
| Debian | mruby | forky | 4.0.0-1 | not affected |
| Debian | mruby | trixie | 3.3.0-1 | not affected |
| Debian | mruby | bookworm | 3.1.0-3 | not affected |
| Cpe | mruby | Not reported | Not reported | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | mruby | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | mruby | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | mruby | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | mruby | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libmruby-dev]Not affected
Source package: [mruby]
Details (2)
3.1.0-3· amd64 · bookwormNot affected
dsa · mruby · debian · bookworm
3.1.0-3· arm64 · bookwormNot affected
dsa · mruby · debian · bookworm
- [mruby]Not affected
Details (2)
3.1.0-3· amd64 · bookwormNot affected
dsa · mruby · debian · bookworm
3.1.0-3· arm64 · bookwormNot affected
dsa · mruby · debian · bookworm
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2025-12875]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-12875]
- [https://security-tracker.debian.org/tracker/CVE-2025-12875]
- [https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2563.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]