CVE-2011-3940
CVE-2011-3940 is a medium-severity vulnerability in Ffmpeg with a CVSS 2.0 base score of 6.8. 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-119.
Key facts
- Severity: Medium (CVSS 2.0 base score 6.8)
- EPSS exploit prediction: 3% (84th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Ffmpeg
- Published:
- Last modified:
Description
nsvdec.c in libavcodec in FFmpeg 0.7.x before 0.7.12 and 0.8.x before 0.8.11, and in Libav 0.5.x before 0.5.9, 0.6.x before 0.6.6, 0.7.x before 0.7.5, and 0.8.x before 0.8.1, allows remote attackers to cause a denial of service (out-of-bounds read and write) via a crafted NSV file that triggers "use of uninitialized streams."
Frequently asked questions
- What is CVE-2011-3940?
- nsvdec.c in libavcodec in FFmpeg 0.7.x before 0.7.12 and 0.8.x before 0.8.11, and in Libav 0.5.x before 0.5.9, 0.6.x before 0.6.6, 0.7.x before 0.7.5, and 0.8.x before 0.8.1, allows remote attackers to cause a denial of service (out-of-bounds read and write) via a crafted NSV file that triggers "use of uninitialized streams."
- How severe is CVE-2011-3940?
- CVE-2011-3940 has a CVSS 2.0 base score of 6.8, rated medium severity.
- Is CVE-2011-3940 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2011-3940?
- CVE-2011-3940 primarily affects Ffmpeg. In total, 33 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2011-3940?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2011-3940 published?
- CVE-2011-3940 was published on 2012-08-20 and last updated on 2026-06-16.
References
- http://ffmpeg.org/
- http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=5c011706bc752d34bc6ada31d7df2ca0c9af7c6b
- http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=8fd8a48263ff1437f9d02d7e78dc63efb9b5ed3a
- http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=c898431ca5ef2a997fe9388b650f658fb60783e5
- http://libav.org/
- http://secunia.com/advisories/49089
- http://www.debian.org/security/2012/dsa-2471
- http://www.ubuntu.com/usn/USN-1479-1
Affected products (33)
- cpe:2.3:a:ffmpeg:ffmpeg:0.7.1:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.7.2:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.7.6:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.7.7:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.7.8:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.7.9:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.7.11:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.8.5:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.8.6:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.8.7:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.8.8:*:*:*:*:*:*:*
- cpe:2.3:a:ffmpeg:ffmpeg:0.8.10:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.5:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.5.1:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.5.2:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.5.3:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.5.4:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.5.5:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.5.6:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.5.7:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.6:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.6.1:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.6.2:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.6.3:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.6.4:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.6.5:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.7:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.7.1:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.7.2:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.7.3:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.7.4:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.8:*:*:*:*:*:*:*
- cpe:2.3:a:libav:libav:0.8:beta2:*:*:*:*:*:*
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