CVE-2011-0990: n/a vulnerability

CVE-2011-0990: Race condition in the FastCopy optimization in the Array.Copy method in metadata/icall.c in Mono, when Moon...

Race condition in the FastCopy optimization in the Array.Copy method in metadata/icall.c in Mono, when Moonlight 2.x before 2.4.1 or 3.x before 3.99.3 is used, allows remote attackers to trigger a buffer overflow and modify internal data structures, and cause a denial of service (plugin crash) or corrupt the internal state of the security manager, via a crafted media file in which a thread makes a change after a type check but before a copy action.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 22:14 UTC (UTC+00:00)

Security readout for executives and security teams

This vulnerability affects old Moonlight browser-plugin runtimes built on Mono. A malicious media file could crash the plugin or interfere with internal security state. It matters mainly where legacy Moonlight 2.x or 3.x remains installed and reachable through browser/media workflows. Likely limited to legacy systems with Moonlight browser plugin/runtime versions before 2.4.1 or 3.99.3. Modern environments are unlikely to have Moonlight deployed, but old Linux desktops, kiosks, or archived application stacks should be checked. Prioritize as a legacy exposure cleanup item. Treat exposed Moonlight installations as high risk, but expect low prevalence in modern fleets. Removal or upgrade should be straightforward unless an old application still depends on it. Mitigation focus: Upgrade Moonlight 2.x to 2.4.1 or later.; Upgrade Moonlight 3.x to 3.99.3 or later.; Apply vendor or distribution security updates for affected Mono/Moonlight packages..

Prepared: Jun 24, 2026, 13:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 13, 2011, 21:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.novell.com/show_bug.cgi?id=667077CVE reference · x_refsource_CONFIRM
https://github.com/mono/mono/commit/2f00e4bbb2137130845afb1b2a1e678552fc8e5cCVE reference · x_refsource_CONFIRM
momo-arraycopy-security-bypass(66625)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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