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CVE-2011-3940

22
FAUCET Score

CVE-2011-3940 describes an out-of-bounds read and write vulnerability in the nsvdec.c component of libavcodec, affecting FFmpeg versions 0.7.x and 0.8.x, and Libav versions 0.5.x, 0.6.x, 0.7.x, and 0.8.x. This flaw allows remote attackers to trigger a denial of service by providing a specially crafted NSV file that causes "use of uninitialized streams." With a CVSS score of 6.8 (Medium), this vulnerability has a network attack vector, medium attack complexity, and potential for partial confidentiality, integrity, and availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.7.1CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:0.7.1:*:*:*:*:*:*:*
0.7.2CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:0.7.2:*:*:*:*:*:*:*
0.7.6CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:0.7.6:*:*:*:*:*:*:*
0.7.7CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:0.7.7:*:*:*:*:*:*:*
0.7.8CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:0.7.8:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.73%
Probability of exploitation in next 30 days
EPSS Percentile
84.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0273 is in the 76th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

asteriskpatch availablevia llm_extracted
Fixed in: 0.7.12
View patch
asteriskpatch availablevia llm_extracted
Fixed in: 0.8.11
View patch
bitbucketpatch availablevia llm_extracted
Fixed in: 0.7.12
bitbucketpatch availablevia llm_extracted
Fixed in: 0.8.11
elementpatch availablevia llm_extracted
Fixed in: 0.8.11
elementpatch availablevia llm_extracted
Fixed in: 0.7.12
gl_inetpatch availablevia llm_extracted
Fixed in: 0.7.12
gl_inetpatch availablevia llm_extracted
Fixed in: 0.8.11
jfrogpatch availablevia llm_extracted
Fixed in: 0.8.11

Vendor Advisories (9)

jfrogllm-jfrog-3956302d00e9edd3

Multiple vulnerabilities fixed in FFmpeg 0.8.11

asteriskllm-asterisk-52a1f77642abd59c

Multiple vulnerabilities fixed in FFmpeg 0.8.11

asteriskllm-asterisk-741ccf240d60c943

Multiple vulnerabilities fixed in FFmpeg 0.7.12

gl_inetllm-gl_inet-ef8cb0069c1c4e72

Multiple vulnerabilities fixed in FFmpeg 0.8.11

gl_inetllm-gl_inet-850b6a71d3cca22f

Multiple vulnerabilities fixed in FFmpeg 0.7.12

bitbucketllm-bitbucket-cfd8951d05a265c3

Multiple vulnerabilities fixed in FFmpeg 0.8.11

bitbucketllm-bitbucket-df1ba690ba05057d

Multiple vulnerabilities fixed in FFmpeg 0.7.12

elementllm-element-2daeb1f73df7810c

Multiple vulnerabilities fixed in FFmpeg 0.8.11

elementllm-element-0a8ec42d42653234

Multiple vulnerabilities fixed in FFmpeg 0.7.12

References

ffmpeg.org
git.videolan.org
git.videolan.org
git.videolan.org
libav.org
secunia.com / advisories/49089
debian.org / security/2012/dsa-2471
ubuntu.com / usn/USN-1479-1