CVE-2010-0159: Canonical Ubuntu Linux

High severity, CVSS 10.0. EPSS: 4.7% chance of exploitation in the next 30 days.

The browser engine in Mozilla Firefox 3.0.x before 3.0.18 and 3.5.x before 3.5.8, Thunderbird before 3.0.2, and SeaMonkey before 2.0.3 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to the nsBlockFrame::StealFrame function in layout/generic/nsBlockFrame.cpp, and unspecified other vectors.

Affected products

• Canonical Ubuntu Linux: version 8.04 only; version 8.10 only; version 9.04 only; version 9.10 only
• Debian Debian Linux: version 5.0 only
• Mozilla Firefox: from 3.0, before 3.0.18 (fixed in 3.0.18); from 3.5, before 3.5.8 (fixed in 3.5.8)
• Mozilla Seamonkey: before 2.0.3 (fixed in 2.0.3)
• Mozilla Thunderbird: before 3.0.2 (fixed in 3.0.2)

Published 2010-02-22. Last modified 2026-06-16.