CVE-2010-3971

Severity: critical (CVSS 9.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 81.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2010-12-22 · updated 2026-06-16
Weakness: CWE-399

Description

Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style Sheets (CSS) parser in mshtml.dll, as used in Microsoft Internet Explorer 6 through 8 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a self-referential @import rule in a stylesheet, aka "CSS Memory Corruption Vulnerability."

Affected products

Microsoft Internet Explorer 11: 7, 8

References

http://blogs.technet.com/b/srd/archive/2011/01/07/assessing-the-risk-of-public-issues-currently-being-tracked-by-the-msrc.aspx
http://seclists.org/fulldisclosure/2010/Dec/110
http://secunia.com/advisories/42510
http://support.avaya.com/css/P8/documents/100127294
http://www.breakingpointsystems.com/community/blog/ie-vulnerability/
http://www.exploit-db.com/exploits/15708
http://www.exploit-db.com/exploits/15746
http://www.kb.cert.org/vuls/id/634956
http://www.microsoft.com/technet/security/advisory/2488013.mspx
http://www.securityfocus.com/bid/45246
http://www.securitytracker.com/id?1024922
http://www.vupen.com/english/advisories/2010/3156

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