CVE-2011-0991: n/a vulnerability

CVE-2011-0991: Use-after-free vulnerability in Mono, when Moonlight 2.x before 2.4.1 or 3.x before 3.99.3 is used, allows...

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.

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

Security readout for executives and security teams

This is a legacy Mono/Moonlight memory-safety flaw. A remote attacker could crash affected Moonlight runtimes and may have had other unspecified impact. The main business question is whether Moonlight 2.x or 3.x still exists in the environment, because the technology is old and likely limited to legacy systems. Exposure is likely limited to systems running legacy Moonlight with Mono, especially browser-plugin or application stacks that retained Moonlight 2.x or 3.x. The source bundle does not identify broader affected products or modern platform exposure. Treat as a legacy exposure cleanup item unless Moonlight is externally reachable or business-critical. If present on internet-facing systems, prioritize removal or upgrade because the flaw is remotely reachable and memory-safety related. Mitigation focus: Inventory systems for Mono and Moonlight 2.x or 3.x installations.; Upgrade Moonlight to 2.4.1, 3.99.3, or later where still required.; Remove or disable Moonlight where no business dependency remains..

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

7Source 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=660422CVE reference · x_refsource_CONFIRM
https://github.com/mono/mono/commit/89d1455a80ef13cddee5d79ec00c06055da3085cCVE reference · x_refsource_CONFIRM
momo-dynamicmethod-code-execution(66626)CVE reference · vdb-entry, x_refsource_XF
https://bugzilla.novell.com/show_bug.cgi?id=667077CVE reference · x_refsource_CONFIRM
https://github.com/mono/mono/commit/3f8ee42b8c867d9a4c18c22657840d072cca5c3aCVE reference · x_refsource_CONFIRM
https://github.com/mono/mono/commit/8eb1189099e02372fd45ca1c67230eccf1edddc0CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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