CVE-2011-0989

The RuntimeHelpers.InitializeArray method in metadata/icall.c in Mono, when Moonlight 2.x before 2.4.1 or 3.x before 3.99.3 is used, does not properly restrict data types, which allows remote attackers to modify internal read-only data structures, and cause a denial of service (plugin crash) or corrupt the internal state of the security manager, via a crafted media file, as demonstrated by modifying a C# struct.

Published: 2011-04-13 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-0989 is rated Moderate Risk (54.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.69%). EPSS rose +1.72% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-0989

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.97% 2.69% +1.72%
2 2025-05-18 1.14% 0.97% -0.16%
3 2025-03-30 — 1.14% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-0989

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2011-0989

OS Trackers for CVE-2011-0989

vendor priority summary link
debian unimportant CVE-2011-0989 unimportant priority: Debian including 1 source packages (mono), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-0989
gentoo high CVE-2011-0989: 1 GLSA(s) (201206-13), 2 atom(s) (dev-lang/mono, dev-util/mono-debugger); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-0989
ubuntu negligible CVE-2011-0989 negligible priority: Ubuntu including 1 source packages (mono), 11 status rows across 11 suites (dapper, hardy, karmic, lucid, maverick, natty, oneiric, precise, quantal, raring, upstream): ignored 6, not-affected 4, needs-triage 1. https://ubuntu.com/security/CVE-2011-0989

Affected software / configurations for CVE-2011-0989

Vendor Product Version Raw CPE
mono mono — cpe:2.3:a:mono:mono:*:*:*:*:*:*:*:*
novell moonlight 2.0 cpe:2.3:a:novell:moonlight:2.0:*:*:*:*:*:*:*
novell moonlight 2.3.0 cpe:2.3:a:novell:moonlight:2.3.0:*:*:*:*:*:*:*
novell moonlight 2.4 cpe:2.3:a:novell:moonlight:2.4:*:*:*:*:*:*:*
novell moonlight 2.31 cpe:2.3:a:novell:moonlight:2.31:*:*:*:*:*:*:*
novell moonlight 3.0 cpe:2.3:a:novell:moonlight:3.0:*:*:*:*:*:*:*
novell moonlight 3.99 cpe:2.3:a:novell:moonlight:3.99:*:*:*:*:*:*:*

References for CVE-2011-0989

cvelogic Threat Intelligence