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GStreamer gst-plugins-good CVE-2026-73434

| EUVDEUVD-2026-57443 MEDIUM
Out-of-bounds Read (CWE-125)
2026-08-12 redhat GHSA-wfhj-v65x-vjp5
Information Disclosure Buffer Overflow Denial Of Service Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 9
6.1
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
6.1 HIGH
AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
vuln.today AI
7.1 HIGH

Network-delivered crafted AVI, no auth needed, user must open file; DoS is primary impact with minor OOB-read confidentiality leak; no integrity impact.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
8.2 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Red Hat
6.1 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

Lifecycle Timeline

5
Patch available
Aug 12, 2026 - 23:03 EUVD
Severity Changed
Aug 12, 2026 - 22:22 NVD
HIGH MEDIUM
CVSS changed
Aug 12, 2026 - 22:22 NVD
7.1 (HIGH) 6.1 (MEDIUM)
Analysis Generated
Aug 12, 2026 - 19:52 vuln.today
CVE Published
Aug 12, 2026 - 19:05 cve.org
HIGH 7.1

DescriptionCVE.org

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. Processing a crafted AVI via playbin/decodebin can crash the application (denial of service). Fixed upstream in gst-plugins-good 1.28.6 (GStreamer-SA-2026-0072).

AnalysisAI

Out-of-bounds read in GStreamer's avidemux plugin (gst-plugins-good) allows a remote, unauthenticated attacker to crash media-processing applications and potentially leak memory contents by supplying a crafted AVI file. The flaw resides in gst_avi_demux_riff_parse_vprp(), where the count of video field descriptors is derived by dividing remaining buffer size by an attacker-controlled vprp->fields value rather than the struct size, causing the parser to treat more descriptors as valid than the buffer holds. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft AVI with malicious VPRP chunk
Delivery
Deliver file to victim (email/web/upload)
Exploit
Victim opens file in GStreamer application
Execution
avidemux parses VPRP with inflated descriptor count
Impact
Out-of-bounds read triggers crash or memory disclosure
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the victim application uses GStreamer's avidemux plugin (part of gst-plugins-good) to parse an AVI file - specifically, a file containing a VPRP chunk with a crafted vprp->fields value. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H) accurately reflects the attack profile: network-reachable via crafted media files, low complexity, no authentication required, but requiring user interaction (victim opens or streams the AVI). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker hosts or emails a specially crafted AVI file with a manipulated VPRP chunk containing a vprp->fields value chosen to maximise the computed descriptor count. When a victim opens the file in any GStreamer-backed application (GNOME Videos, a web browser using GStreamer for media, a transcoding service), the avidemux parser reads past the end of the field-descriptor buffer, causing an immediate application crash. …
Remediation The primary fix is upgrading gst-plugins-good to version 1.28.6 or later, per GStreamer-SA-2026-0072 (https://gstreamer.freedesktop.org/security/sa-2026-0072.html). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all systems running gst-plugins-good and map which handle untrusted AVI sources and their operational criticality. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Server 16.0 Affected

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CVE-2026-73434 vulnerability details – vuln.today
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