CVE-2010-0159

CVE-2010-0159 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

• Severity: Critical (CVSS 2.0 base score 10.0)
• EPSS exploit prediction: 5% (91st percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Mozilla Firefox
• Published: 2010-02-22
• Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2010-0159?

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.

How severe is CVE-2010-0159?

CVE-2010-0159 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2010-0159 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-0159?

CVE-2010-0159 primarily affects Mozilla Firefox. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-0159?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2010-0159 published?

CVE-2010-0159 was published on 2010-02-22 and last updated on 2026-06-16.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035346.html
• http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035367.html
• http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035426.html
• http://lists.fedoraproject.org/pipermail/package-announce/2010-March/036097.html
• http://lists.fedoraproject.org/pipermail/package-announce/2010-March/036132.html
• http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00001.html
• http://secunia.com/advisories/37242
• http://secunia.com/advisories/38770
• http://secunia.com/advisories/38772
• http://secunia.com/advisories/38847
• http://www.debian.org/security/2010/dsa-1999
• http://www.mandriva.com/security/advisories?name=MDVSA-2010:042
• http://www.mozilla.org/security/announce/2010/mfsa2010-01.html
• http://www.redhat.com/support/errata/RHSA-2010-0112.html
• http://www.redhat.com/support/errata/RHSA-2010-0113.html
• http://www.redhat.com/support/errata/RHSA-2010-0153.html
• http://www.redhat.com/support/errata/RHSA-2010-0154.html
• http://www.ubuntu.com/usn/USN-895-1
• http://www.ubuntu.com/usn/USN-896-1
• http://www.vupen.com/english/advisories/2010/0405
• http://www.vupen.com/english/advisories/2010/0650
• https://bugzilla.mozilla.org/show_bug.cgi?id=467005
• https://bugzilla.mozilla.org/show_bug.cgi?id=501934
• https://bugzilla.mozilla.org/show_bug.cgi?id=527567
• https://bugzilla.mozilla.org/show_bug.cgi?id=528134
• https://bugzilla.mozilla.org/show_bug.cgi?id=528300
• https://bugzilla.mozilla.org/show_bug.cgi?id=530880
• https://bugzilla.mozilla.org/show_bug.cgi?id=534082
• https://exchange.xforce.ibmcloud.com/vulnerabilities/56359
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8485

Affected products (8)

• cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:lts:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:8.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:9.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:9.10:*:*:*:*:*:*:*

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