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CVE-2016-9634: Heap-based buffer overflow in the flx_decode_delta_fli function in gst/flx/gstflxdec.c in the FLIC decoder in

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CRITICAL 9.8REMOTEWATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2016-9634 is a critical-severity flaw (CVSS 9.8) affecting gstreamer, enterprise linux desktop, enterprise linux hpc node. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in the flx_decode_delta_fli function in gst/flx/gstflxdec.c in the FLIC decoder in GStreamer before 1.10.2 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via the start_line parameter.

Why this priority

  • Critical severity
  • EPSS top 5%: very likely to be exploited
  • Public exploit reference
  • Remotely exploitable, no login, no user action
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance8.8% (top 5%)
CISA exploited listNo
WeaknessCWE-119
Published2017-01-27
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: debian · gstreamer · redhat

Share: LinkedIn · X · Reddit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

gstreamer gstreamer UPGRADE
Affected: <= 1.10.1
Fixed in: newer than 1.10.1
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy gstreamer || rpm -q gstreamer || gstreamer --version
2. UPGRADE to newer than 1.10.1 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade gstreamer
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade gstreamer
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
redhat enterprise linux desktop MITIGATE
Affected: 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
redhat enterprise linux hpc node MITIGATE
Affected: 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
redhat enterprise linux server MITIGATE
Affected: 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
redhat enterprise linux workstation MITIGATE
Affected: 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
debian debian linux MITIGATE
Affected: 8.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 8.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.
Fedora 46 · root · FIXED · 6.40.04-7.fc46 · FEDORA-2026-7329868400 · source
sudo dnf upgrade --advisory=FEDORA-2026-7329868400
Debian 12 · gst-plugins-good1.0 · FIXED · 1.10.1-2
sudo apt update && sudo apt install --only-upgrade gst-plugins-good1.0 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' gst-plugins-good1.0)" ge "1.10.1-2" && echo PATCHED || echo STILL-VULNERABLE
Debian 13 · gst-plugins-good1.0 · FIXED · 1.10.1-2
sudo apt update && sudo apt install --only-upgrade gst-plugins-good1.0 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' gst-plugins-good1.0)" ge "1.10.1-2" && echo PATCHED || echo STILL-VULNERABLE
RHEL 6 · gstreamer-plugins-good · FIXED · gstreamer-plugins-good-0.10.23-4.el6_8
sudo dnf upgrade --advisory=RHSA-2016:2975 rpm -q gstreamer-plugins-good
RHEL 7 · gstreamer-plugins-good · FIXED · gstreamer-plugins-good-0.10.31-12.el7_3
sudo dnf upgrade --advisory=RHSA-2017:0019 rpm -q gstreamer-plugins-good
RHEL 7 · gstreamer1-plugins-good · FIXED · gstreamer1-plugins-good-1.4.5-3.el7_3
sudo dnf upgrade --advisory=RHSA-2017:0020 rpm -q gstreamer1-plugins-good
RHEL 5 · gstreamer-plugins-good · DEFERRED
Alpine 3.20 · gst-plugins-good · FIXED · gst-plugins-good-1.10.4-r0
apk add --upgrade gst-plugins-good apk info -v gst-plugins-good
Alpine 3.21 · gst-plugins-good · FIXED · gst-plugins-good-1.10.4-r0
apk add --upgrade gst-plugins-good apk info -v gst-plugins-good
Alpine 3.22 · gst-plugins-good · FIXED · gst-plugins-good-1.10.4-r0
apk add --upgrade gst-plugins-good apk info -v gst-plugins-good
Alpine 3.23 · gst-plugins-good · FIXED · gst-plugins-good-1.10.4-r0
apk add --upgrade gst-plugins-good apk info -v gst-plugins-good

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

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-2016-9634?

gstreamer: upgrade to newer than 1.10.1; enterprise linux desktop: mitigate or apply the listed mitigation; enterprise linux hpc node: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2016-9634 being exploited?

CVE-2016-9634 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-2016-9634 affect?

CVE-2016-9634 affects gstreamer, enterprise linux desktop, enterprise linux hpc node. Severity is critical (CVSS 9.8). Heap-based buffer overflow in the flx_decode_delta_fli function in gst/flx/gstflxdec.c in the FLIC decoder in GStreamer before 1.10.2 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via the

How urgent is CVE-2016-9634?

Priority 73/100. Critical severity; EPSS top 5%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

References

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