Bug 2514807 (CVE-2026-73434)

Summary: CVE-2026-73434 gstreamer1-plugins-good: gstreamer: out-of-bounds read in avidemux vprp video field descriptor parsing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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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).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-12 16:24:00 UTC 
The CVE was requested in this ticket: https://redhat.atlassian.net/browse/PSIRTSUPT-20037
(Also received as resubmission: https://redhat.atlassian.net/browse/PSIRTSUPT-21422)

Reserved the following CVE ID(s):
CVE-2026-73434
├─ State:	RESERVED
├─ Owning CNA:	redhat
├─ Reserved by:	ctimko (redhat)
└─ Reserved on:	Wed Aug 12 16:14:17 2026 +0000
Comment 1 errata-xmlrpc 2026-08-17 03:44:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:55434 https://access.redhat.com/errata/RHSA-2026:55434
Comment 2 errata-xmlrpc 2026-08-17 05:31:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:55436 https://access.redhat.com/errata/RHSA-2026:55436
Comment 5 errata-xmlrpc 2026-08-19 13:42:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:56966 https://access.redhat.com/errata/RHSA-2026:56966