CVE-2011-2631

Opera < 11.11 - Denial of Service via CSS column-count Property

Title source: llm
STIX 2.1

Description

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.

References (3)

Core 3
Core References
Vendor Advisory x_refsource_confirm
http://www.opera.com/docs/changelogs/unix/1111/
Vendor Advisory x_refsource_confirm
http://www.opera.com/docs/changelogs/windows/1111/
Vendor Advisory x_refsource_confirm
http://www.opera.com/docs/changelogs/mac/1111/

Scores

EPSS 0.0049
EPSS Percentile 65.9%

Details

CWE
CWE-20
Status published
Products (30)
opera/opera_browser 5.0 (8 CPE variants)
opera/opera_browser 5.02
opera/opera_browser 5.10
opera/opera_browser 5.11
opera/opera_browser 5.12
opera/opera_browser 6.0 (6 CPE variants)
opera/opera_browser 6.1 (2 CPE variants)
opera/opera_browser 6.01
opera/opera_browser 6.02
opera/opera_browser 6.03
... and 20 more
Published Jul 01, 2011
Tracked Since Feb 18, 2026