CVE-2011-3945

The decode_frame function in the KVG1 decoder (kgv1dec.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 (crash) and possibly execute arbitrary code via a crafted media file.

Published: 2012-08-20 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-3945 is rated Moderate Risk (58.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.15%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-3945

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.34% 3.15% +0.81%
2 2026-03-01 2.35% 2.34% -0.01%
3 2025-05-15 — 2.35% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-3945

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2011-3945

OS Trackers for CVE-2011-3945

vendor priority summary link
debian unimportant CVE-2011-3945 unimportant priority: Debian including 1 source packages (ffmpeg), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-3945
gentoo high CVE-2011-3945: 2 GLSA(s) (201210-06, 201310-12), 2 atom(s) (media-video/ffmpeg, media-video/libav); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-3945
ubuntu medium CVE-2011-3945 medium priority: Ubuntu including 4 source packages (ffmpeg, ffmpeg-extra, libav, libav-extra), 24 status rows across 6 suites (hardy, lucid, natty, oneiric, precise, upstream): DNE 11, released 5, not-affected 4, needs-triage 3, ignored 1. https://ubuntu.com/security/CVE-2011-3945

Affected software / configurations for CVE-2011-3945

Vendor Product Version Raw CPE
ffmpeg ffmpeg 0.7 cpe:2.3:a:ffmpeg:ffmpeg:0.7:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.7.1 cpe:2.3:a:ffmpeg:ffmpeg:0.7.1:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.7.2 cpe:2.3:a:ffmpeg:ffmpeg:0.7.2:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.7.3 cpe:2.3:a:ffmpeg:ffmpeg:0.7.3:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.7.6 cpe:2.3:a:ffmpeg:ffmpeg:0.7.6:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.7.7 cpe:2.3:a:ffmpeg:ffmpeg:0.7.7:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.7.8 cpe:2.3:a:ffmpeg:ffmpeg:0.7.8:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.7.9 cpe:2.3:a:ffmpeg:ffmpeg:0.7.9:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.7.11 cpe:2.3:a:ffmpeg:ffmpeg:0.7.11:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.8.0 cpe:2.3:a:ffmpeg:ffmpeg:0.8.0:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.8.1 cpe:2.3:a:ffmpeg:ffmpeg:0.8.1:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.8.2 cpe:2.3:a:ffmpeg:ffmpeg:0.8.2:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.8.5 cpe:2.3:a:ffmpeg:ffmpeg:0.8.5:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.8.6 cpe:2.3:a:ffmpeg:ffmpeg:0.8.6:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.8.7 cpe:2.3:a:ffmpeg:ffmpeg:0.8.7:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.8.8 cpe:2.3:a:ffmpeg:ffmpeg:0.8.8:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.8.10 cpe:2.3:a:ffmpeg:ffmpeg:0.8.10:*:*:*:*:*:*:*
libav libav 0.5 cpe:2.3:a:libav:libav:0.5:*:*:*:*:*:*:*
libav libav 0.5.1 cpe:2.3:a:libav:libav:0.5.1:*:*:*:*:*:*:*
libav libav 0.5.2 cpe:2.3:a:libav:libav:0.5.2:*:*:*:*:*:*:*
libav libav 0.5.3 cpe:2.3:a:libav:libav:0.5.3:*:*:*:*:*:*:*
libav libav 0.5.4 cpe:2.3:a:libav:libav:0.5.4:*:*:*:*:*:*:*
libav libav 0.5.5 cpe:2.3:a:libav:libav:0.5.5:*:*:*:*:*:*:*
libav libav 0.5.6 cpe:2.3:a:libav:libav:0.5.6:*:*:*:*:*:*:*
libav libav 0.5.7 cpe:2.3:a:libav:libav:0.5.7:*:*:*:*:*:*:*
libav libav 0.6 cpe:2.3:a:libav:libav:0.6:*:*:*:*:*:*:*
libav libav 0.6.1 cpe:2.3:a:libav:libav:0.6.1:*:*:*:*:*:*:*
libav libav 0.6.2 cpe:2.3:a:libav:libav:0.6.2:*:*:*:*:*:*:*
libav libav 0.6.3 cpe:2.3:a:libav:libav:0.6.3:*:*:*:*:*:*:*
libav libav 0.6.4 cpe:2.3:a:libav:libav:0.6.4:*:*:*:*:*:*:*
libav libav 0.6.5 cpe:2.3:a:libav:libav:0.6.5:*:*:*:*:*:*:*
libav libav 0.7 cpe:2.3:a:libav:libav:0.7:*:*:*:*:*:*:*
libav libav 0.7 cpe:2.3:a:libav:libav:0.7:beta1:*:*:*:*:*:*
libav libav 0.7 cpe:2.3:a:libav:libav:0.7:beta2:*:*:*:*:*:*
libav libav 0.7.1 cpe:2.3:a:libav:libav:0.7.1:*:*:*:*:*:*:*
libav libav 0.7.2 cpe:2.3:a:libav:libav:0.7.2:*:*:*:*:*:*:*
libav libav 0.7.3 cpe:2.3:a:libav:libav:0.7.3:*:*:*:*:*:*:*
libav libav 0.7.4 cpe:2.3:a:libav:libav:0.7.4:*:*:*:*:*:*:*
libav libav 0.8 cpe:2.3:a:libav:libav:0.8:*:*:*:*:*:*:*
libav libav 0.8 cpe:2.3:a:libav:libav:0.8:beta2:*:*:*:*:*:*

References for CVE-2011-3945

cvelogic Threat Intelligence