Description
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 (plugin crash) or obtain sensitive information via vectors related to member data in a resurrected MonoThread instance.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | mono | 3.2.8+dfsg-4ubuntu1.1 | USN-2547-1 |
Advisories 1
- USN-2547-1 mono vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
References
- momo-monothread-info-disclosure(66627) vdb-entry
- https://bugzilla.novell.com/show_bug.cgi?id=678515
- https://bugzilla.novell.com/show_bug.cgi?id=667077
- 47208 vdb-entry
- [oss-security] 20110406 Moonlight release 2.4.1 with security fixes mailing-list
- 44002 third-party-advisory
- http://www.mono-project.com/Vulnerabilities
- https://bugzilla.redhat.com/show_bug.cgi?id=694933
- https://github.com/mono/mono/commit/722f9890f09aadfc37ae479e7d946d5fc5ef7b91
- 44076 third-party-advisory
- [opensuse-updates] 20110408 openSUSE-SU-2011:0313-1 (critical): moonlight security update mailing-list
- ADV-2011-0904 vdb-entry