CVE-2011-2631: n/a vulnerability

CVE-2011-2631: The Cascading Style Sheets (CSS) implementation in Opera before 11.11 does not properly handle the column-c...

The Cascading Style Sheets (CSS) implementation in Opera before 11.11 does not properly handle the column-count property, which allows remote attackers to cause a denial of service (infinite repaint loop and application hang) via a web page, as demonstrated by an unspecified Wikipedia page.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 17, 2024, 03:33 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw can make old Opera browsers hang when rendering certain CSS content on a web page. It is a business concern mainly where legacy Opera versions before 11.11 remain in use, such as old kiosks, embedded workstations, or unsupported desktop images. Exposure is likely limited to systems still running Opera versions earlier than 11.11. Modern browsers or upgraded Opera installations are not identified as affected in the provided sources. Treat as low priority unless legacy Opera is still used in operational environments. The expected impact is browser availability disruption, not confirmed data exposure or host compromise. Mitigation focus: Upgrade any Opera installation older than 11.11 to 11.11 or later.; Retire unsupported legacy Opera deployments where upgrade is not practical.; Limit legacy browser access to untrusted websites until remediation is complete..

Prepared: Jun 27, 2026, 18:09 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: Jul 1, 2011, 10:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

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