What’s Vulnerable › Vulnerabilities

CVE-2011-2821

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2011-08-29 · updated 2026-06-16
• Weakness: CWE-415

Description

Double free vulnerability in libxml2, as used in Google Chrome before 13.0.782.215, allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted XPath expression.

Affected products

• Apple Iphone Os: before 6.0 — fixed in 6.0
• macOS: before 10.7.4 — fixed in 10.7.4
• Debian Linux: 5.0, 6.0, 7.0
• Google Chrome: before 13.0.782.215 — fixed in 13.0.782.215
• RedHat Enterprise Linux Desktop: 6.0
• RedHat Enterprise Linux Eus: 6.3
• RedHat Enterprise Linux Server: 6.0
• RedHat Enterprise Linux Workstation: 6.0

How to fix

Upgrade to a fixed version: Apple Iphone Os 6.0; macOS 10.7.4; Google Chrome 13.0.782.215. Check the vendor advisory for mitigations.

References

• http://code.google.com/p/chromium/issues/detail?id=89402
• http://googlechromereleases.blogspot.com/2011/08/stable-channel-update_22.html
• http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
• http://lists.apple.com/archives/security-announce/2012/May/msg00001.html
• http://lists.apple.com/archives/security-announce/2012/Sep/msg00003.html
• http://rhn.redhat.com/errata/RHSA-2013-0217.html
• http://support.apple.com/kb/HT5281
• http://support.apple.com/kb/HT5503
• http://www.debian.org/security/2012/dsa-2394
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:145
• http://www.redhat.com/support/errata/RHSA-2011-1749.html
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13840

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