CVE-2011-4579

The svq1_decode_frame function in the SVQ1 decoder (svq1dec.c) in libavcodec in FFmpeg 0.5.x before 0.5.7, 0.6.x before 0.6.4, 0.7.x before 0.7.9, and 0.8.x before 0.8.8; and in Libav 0.5.x before 0.5.6, 0.6.x before 0.6.4, and 0.7.x before 0.7.3 allows remote attackers to cause a denial of service (memory corruption) via a crafted SVQ1 stream, related to "dimensions changed."

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-2011-4579 is rated Moderate Risk (48.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.33%). EPSS rose +1.13% over the last day, indicating growing attacker interest. 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-2011-4579

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 2.21% 3.33% +1.13%
2 2026-01-25 2.94% 2.21% -0.74%
3 2025-11-04 — 2.94% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4579

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2011-4579

OS Trackers for CVE-2011-4579

vendor priority summary link
debian not yet assigned CVE-2011-4579 not yet assigned 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-2011-4579
ubuntu medium CVE-2011-4579 medium priority: Ubuntu including 4 source packages (ffmpeg, ffmpeg-extra, libav, libav-extra), 24 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): DNE 11, released 9, needs-triage 3, ignored 1. https://ubuntu.com/security/CVE-2011-4579

Affected software / configurations for CVE-2011-4579

Vendor Product Version Raw CPE
ffmpeg ffmpeg 0.5 cpe:2.3:a:ffmpeg:ffmpeg:0.5:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.5.1 cpe:2.3:a:ffmpeg:ffmpeg:0.5.1:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.5.2 cpe:2.3:a:ffmpeg:ffmpeg:0.5.2:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.5.3 cpe:2.3:a:ffmpeg:ffmpeg:0.5.3:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.5.4 cpe:2.3:a:ffmpeg:ffmpeg:0.5.4:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.5.5 cpe:2.3:a:ffmpeg:ffmpeg:0.5.5:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.6 cpe:2.3:a:ffmpeg:ffmpeg:0.6:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.6.1 cpe:2.3:a:ffmpeg:ffmpeg:0.6.1:*:*:*:*:*:*:*
ffmpeg ffmpeg 0.6.2 cpe:2.3:a:ffmpeg:ffmpeg:0.6.2:*:*:*:*:*:*:*
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 0.8.0 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:*:*:*:*:*:*:*
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 0.6 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 0.7.1 cpe:2.3:a:libav:libav:0.7.1:*:*:*:*:*:*:*
libav libav 0.7.2 cpe:2.3:a:libav:libav:0.7.2:*:*:*:*:*:*:*

References for CVE-2011-4579

cvelogic Threat Intelligence