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CVE-2011-0992

20
FAUCET Score

CVE-2011-0992 describes a use-after-free vulnerability in Mono, specifically when used with Moonlight 2.x before 2.4.1 or 3.x before 3.99.3. This flaw, related to member data in a resurrected MonoThread instance, allows remote attackers to trigger a denial of service (plugin crash) or potentially access sensitive information. With a CVSS score of 5.8, it is considered a medium-severity vulnerability, requiring medium attack complexity and impacting confidentiality and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:mono:mono:*:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:novell:moonlight:2.0:*:*:*:*:*:*:*
2.3.0CPE matchmatch criteria
cpe:2.3:a:novell:moonlight:2.3.0:*:*:*:*:*:*:*
2.4CPE matchmatch criteria
cpe:2.3:a:novell:moonlight:2.4:*:*:*:*:*:*:*
2.31CPE matchmatch criteria
cpe:2.3:a:novell:moonlight:2.31:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:N/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.69%
Probability of exploitation in next 30 days
EPSS Percentile
84.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0269 is in the 76th percentile among its peer group of 19,953 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch

References

lists.opensuse.org / opensuse-updates/2011-04/msg00024.html
openwall.com / lists/oss-security/2011/04/06/14
Patch
bugzilla.novell.com / show_bug.cgi
Patch
bugzilla.novell.com / show_bug.cgi
bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/44002
Vendor Advisory
secunia.com / advisories/44076
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/66627
github.com / mono/mono/commit/722f9890f09aadfc37ae479e7d946d5fc5ef7b91
Patch
mono-project.com / Vulnerabilities
Vendor Advisory
securityfocus.com / bid/47208
vupen.com / english/advisories/2011/0904
Vendor Advisory