Use-after-free vulnerability in Mono, when Moonlight 2.x before 2.4.1 or 3.x before…
Priority LOW 35CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
Use-after-free vulnerability in Mono, when Moonlight 2.x before 2.4.1 or 3.x before 3.99.3 is used, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to finalizing and then resurrecting a DynamicMethod instance.
Why it matters now
EPSS 0.02928 87th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mono:mono:*:*:*:*:*:*:*:* | all versions | Vulnerable | mono |
| cpe:2.3:a:novell:moonlight:2.0:*:*:*:*:*:*:* | 2.0 | Vulnerable | Novell |
| cpe:2.3:a:novell:moonlight:2.3.0:*:*:*:*:*:*:* | 2.3.0 | Vulnerable | Novell |
| cpe:2.3:a:novell:moonlight:2.4:*:*:*:*:*:*:* | 2.4 | Vulnerable | Novell |
| cpe:2.3:a:novell:moonlight:2.31:*:*:*:*:*:*:* | 2.31 | Vulnerable | Novell |
| cpe:2.3:a:novell:moonlight:3.0:*:*:*:*:*:*:* | 3.0 | Vulnerable | Novell |
| cpe:2.3:a:novell:moonlight:3.99:*:*:*:*:*:*:* | 3.99 | Vulnerable | Novell |
- cpe:2.3:a:mono:mono:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·mono
- cpe:2.3:a:novell:moonlight:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Novell
- cpe:2.3:a:novell:moonlight:2.3.0:*:*:*:*:*:*:* Versions 2.3.0 Vulnerable ·Novell
- cpe:2.3:a:novell:moonlight:2.4:*:*:*:*:*:*:* Versions 2.4 Vulnerable ·Novell
- cpe:2.3:a:novell:moonlight:2.31:*:*:*:*:*:*:* Versions 2.31 Vulnerable ·Novell
- cpe:2.3:a:novell:moonlight:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Novell
- cpe:2.3:a:novell:moonlight:3.99:*:*:*:*:*:*:* Versions 3.99 Vulnerable ·Novell
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2011-0991
- 2026-10-03 Alias added: GHSA-6gxj-qxj4-wm7j
References
Patch 5
- https://github.com/mono/mono/commit/89d1455a80ef13cddee5d79ec00c06055da3085c
- https://bugzilla.novell.com/show_bug.cgi?id=667077
- https://github.com/mono/mono/commit/3f8ee42b8c867d9a4c18c22657840d072cca5c3a
- [oss-security] 20110406 Moonlight release 2.4.1 with security fixes
- https://github.com/mono/mono/commit/8eb1189099e02372fd45ca1c67230eccf1edddc0
Sources
- CVE-2011-0991 · CVE Program
- CVE-2011-0991 · NVD
- FIRST EPSS
- GHSA-6gxj-qxj4-wm7j · GitHub Advisory Database · CC BY 4.0
- CVE-2011-0991 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences