CVE-2026-12892: A flaw was found in GStreamer's gst-plugins-bad package

Routine

MEDIUM 4.4WATCHLISTMITIGATEMITIGATE

CVE-2026-12892 is a medium-severity flaw (CVSS 4.4) affecting gstreamer, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur during parsing. This happens when the parser attempts to check slice boundary information without first verifying that the NAL unit contains enough data beyond the extension header. An attacker could exploit this by tricking a user into o

Why this priority

On your watchlist

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

Risk facts

CVSS score	4.4 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-06-23
Last modified	2026-07-06

Publisher (CNA): Red Hat, Inc. · Vendor: gstreamer · redhat

Last updated 2026-07-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-23 21:16 UTCPublished CVE record published
2026-07-06 18:02 UTCUpdated Record last modified

gstreamer gstreamer 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 gstreamer || rpm -q gstreamer || gstreamer --version

No fixed or unaffected release known

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

redhat enterprise linux MITIGATE

Affected: 6.0 · 7.0 · 8.0 · 9.0 · 10.0

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.

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-2026-12892?

gstreamer: mitigate or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-12892 being exploited?

CVE-2026-12892 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-2026-12892 affect?

CVE-2026-12892 affects gstreamer, enterprise linux. Severity is medium (CVSS 4.4). A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur during parsing. This happens

How urgent is CVE-2026-12892?

Priority 22/100. On your watchlist

Related CVEs

CVE-2026-18296 HIGH 7.8 UPGRADE GStreamer MRF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
CVE-2026-18297 HIGH 7.8 UPGRADE GStreamer OGG File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability
CVE-2026-18295 HIGH 7.8 UPGRADE GStreamer MRF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
CVE-2026-18298 HIGH 7.8 UPGRADE GStreamer PNG File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
CVE-2026-18299 HIGH 7.8 UPGRADE GStreamer rtpsbcdepay Use-After-Free Remote Code Execution Vulnerability

References

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