CVE-2011-0723: FFmpeg 0.5.x, as used in MPlayer and other products, allows remote attackers to cause a denial of service (app

This month

MEDIUM 6.8DOWNGRADEMITIGATE

CVE-2011-0723 is a medium-severity flaw (CVSS 6.8) affecting ffmpeg, mplayer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FFmpeg 0.5.x, as used in MPlayer and other products, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a malformed VC-1 file.

Why this priority

EPSS top 9%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	4.4% (top 9%)
CISA exploited list	No
Weakness	CWE-399
Published	2011-05-20
Last modified	2026-06-16

Publisher (CNA): Canonical Ltd. · Vendor: ffmpeg · mplayer

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2011-05-20 22:55 UTCPublished CVE record published
2026-06-16 23:27 UTCUpdated Record last modified

ffmpeg ffmpeg DOWNGRADE

Affected: 0.5.1 · 0.5.2 · 0.5.3 · 0.5.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.5.1

1. Check installed version

apt-cache policy ffmpeg || rpm -q ffmpeg || ffmpeg --version

2. No fixed release: DOWNGRADE to a release before 0.5.1 (Debian / Ubuntu)

apt-cache madison ffmpeg sudo apt install ffmpeg=<VERSION_BEFORE_0.5.1> sudo apt-mark hold ffmpeg

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ffmpeg sudo dnf downgrade ffmpeg-<VERSION_BEFORE_0.5.1> sudo dnf versionlock add ffmpeg

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

mplayer mplayer MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mplayer || rpm -q mplayer || mplayer --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2011-0723?

ffmpeg: downgrade or apply the listed mitigation; mplayer: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-0723 being exploited?

CVE-2011-0723 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2011-0723 affect?

CVE-2011-0723 affects ffmpeg, mplayer. Severity is medium (CVSS 6.8). FFmpeg 0.5.x, as used in MPlayer and other products, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a malformed VC-1 file.

How urgent is CVE-2011-0723?

Priority 47/100. EPSS top 9%: very likely to be exploited

Software pages

FFmpeg vulnerabilities

Related CVEs

CVE-2026-64831 HIGH 8.8 UPGRADE FFmpeg versions 8.0 through 8.1.2 contains a stack buffer overflow vulnerability in the Vulkan HEVC hardware d
CVE-2026-64834 HIGH 7.5 UPGRADE FFmpeg versions 0.6.3 through 8.1.2 contain an infinite loop vulnerability in the RTP/ASF demuxer within libav
CVE-2026-64830 HIGH 8.8 UPGRADE FFmpeg versions 2.1 through 8.1.2 contains a heap buffer overflow vulnerability in the VobSub subtitle demuxer
CVE-2026-64835 HIGH 8.8 UPGRADE FFmpeg versions 4.4 through 8.1.2 contain an out-of-bounds memory access vulnerability in the ADX audio decode
CVE-2026-64832 HIGH 8.8 UPGRADE FFmpeg versions 4.4 through 8.1.2 contain a double-free vulnerability in the NVIDIA NVDEC hardware decoder wit

References

← Back to latest CVEs