Mupen64Plus is_viewer.c write_is_viewer integer overflow
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- High
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
A security vulnerability has been detected in Mupen64Plus up to 2.6.0. The affected element is the function write_is_viewer of the file src/device/cart/is_viewer.c. The manipulation leads to integer overflow. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The exploit has been disclosed publicly and may be used. The identifier of the patch is 3984137fc0c44110f1ef876adb008885b05a6e18. To fix this issue, it is recommended to deploy a patch.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Mupen64Plus | 2.0; 2.1; 2.2; 2.3; 2.4; 2.5; 2.6.0 | — | No fix listed | CNA |
- Mupen64Plus Vendor— Affected 2.0; 2.1; 2.2; 2.3; 2.4; 2.5; 2.6.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2025-9688
- 2026-10-03 Alias added: GHSA-449c-3xhq-m2q6
References
Sources
- CVE-2025-9688 · CVE Program
- CVE-2025-9688 · NVD
- FIRST EPSS
- GHSA-449c-3xhq-m2q6 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-9688 · Red Hat security data · CC BY 4.0
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