How severe is CVE-2009-4631?

CVE-2009-4631 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-4631 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-2009-4631?

CVE-2009-4631 affects Ffmpeg. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-4631?

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-2009-4631 published?

CVE-2009-4631 was published on 2010-02-10 and last updated on 2026-06-16.

CVE-2009-4631

CVE-2009-4631 is a critical-severity vulnerability in Ffmpeg with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Ffmpeg
Published: 2010-02-10
Last modified: 2026-06-16

Description

Off-by-one error in the VP3 decoder (vp3.c) in FFmpeg 0.5 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted VP3 file that triggers an out-of-bounds read and possibly memory corruption.

Frequently asked questions

What is CVE-2009-4631?: Off-by-one error in the VP3 decoder (vp3.c) in FFmpeg 0.5 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted VP3 file that triggers an out-of-bounds read and possibly memory corruption.
How severe is CVE-2009-4631?: CVE-2009-4631 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-4631 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-2009-4631?: CVE-2009-4631 affects Ffmpeg. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-4631?: 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-2009-4631 published?: CVE-2009-4631 was published on 2010-02-10 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:ffmpeg:ffmpeg:0.5:*:*:*:*:*:*:*

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