CVE-2009-3382

CVE-2009-3382 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

layout/base/nsCSSFrameConstructor.cpp in the browser engine in Mozilla Firefox 3.0.x before 3.0.15 does not properly handle first-letter frames, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.

Frequently asked questions

What is CVE-2009-3382?
layout/base/nsCSSFrameConstructor.cpp in the browser engine in Mozilla Firefox 3.0.x before 3.0.15 does not properly handle first-letter frames, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.
How severe is CVE-2009-3382?
CVE-2009-3382 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2009-3382 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3382?
CVE-2009-3382 primarily affects Mozilla Firefox. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-3382?
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-2009-3382 published?
CVE-2009-3382 was published on 2009-10-29 and last updated on 2026-06-16.

References

Affected products (14)

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