CVE-2026-73434: A flaw was found in GStreamer gst-plugins-good (avidemux)

Q: How do I fix CVE-2026-73434?

gstreamer: upgrade to 1.28.6; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2026-73434 being exploited?

CVE-2026-73434 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-73434 affect?

CVE-2026-73434 affects gstreamer, enterprise linux. Severity is medium (CVSS 6.1). A flaw was found in GStreamer gst-plugins-good (avidemux). In gst_avi_demux_riff_parse_vprp(), the number of available gst_riff_vprp_video_field_desc entries is calculated by dividing the remaining buffer size by the attacker-controlled vpr

Q: How urgent is CVE-2026-73434?

Priority 27/100. On your watchlist

Routine

MEDIUM 6.1WATCHLISTUPGRADEMITIGATE

CVE-2026-73434 is a medium-severity flaw (CVSS 6.1) 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 gst-plugins-good (avidemux). In gst_avi_demux_riff_parse_vprp(), the number of available gst_riff_vprp_video_field_desc entries is calculated by dividing the remaining buffer size by the attacker-controlled vprp->fields value, rather than by sizeof(gst_riff_vprp_video_field_desc). This can cause the parser to treat more field descriptors as available than fit in the input buffer, resulting in out-of-bounds reads. Pro

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-08-12
Last modified	2026-09-23

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

Last updated 2026-09-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-12 20:17 UTCPublished CVE record published
2026-09-23 15:17 UTCUpdated Record last modified

gstreamer gstreamer UPGRADE

Affected: < 1.28.6

Fixed in: 1.28.6

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.28.6 (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 MITIGATE

Affected: 7.0 · 8.0 · 9.0 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

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.

Advisories and coverage

Official advisories

Amazon Linux 2023 ALAS: ALAS2023-2026-3276 (medium): gstreamer1-plugins-good 2026-10-24
Amazon Linux 2 ALAS: ALAS2-2026-4023 (medium): gstreamer-plugins-good 2026-10-24
Amazon Linux 2 ALAS: ALAS2-2026-4024 (medium): gstreamer1-plugins-good 2026-10-24

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-2026-73434?

gstreamer: upgrade to 1.28.6; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-73434 being exploited?

CVE-2026-73434 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-2026-73434 affect?

CVE-2026-73434 affects gstreamer, enterprise linux. Severity is medium (CVSS 6.1). A flaw was found in GStreamer gst-plugins-good (avidemux). In gst_avi_demux_riff_parse_vprp(), the number of available gst_riff_vprp_video_field_desc entries is calculated by dividing the remaining buffer size by the attacker-controlled vpr

How urgent is CVE-2026-73434?

Priority 27/100. On your watchlist

Related CVEs

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CVE-2026-18298 HIGH 7.8 UPGRADE GStreamer PNG File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
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References

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