CVE-2026-125703
Gst-plugins-bad: gst-plugins-bad: bounds check errors in mxf vanc packet handling
A flaw was found in the GStreamer gst-plugins-bad MXF plugin. Insufficient bounds checks when parsing crafted VANC data can cause an out-of-bounds read in the demuxer, while an incorrect buffer size calculation when muxing multiple ancillary packets can cause an out-of-bounds write. Processing affected content may crash the application, resulting in a denial of service.
Fixes and workarounds
Workaround
There is no complete mitigation while processing untrusted MXF content with the affected plugin. If MXF support is not required, disable the MXF plugin in affected GStreamer applications. Otherwise, restrict MXF inputs to trusted sources. Disabling MXF handling prevents legitimate MXF playback and transcoding.
Source: CNA: redhatAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Red Hat Enterprise Linux 10 Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Red Hat gstreamer-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 7 Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 7 Red Hat gstreamer-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 5.5 medium |
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | CNA: redhat |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://access.redhat.com/security/cve/CVE-2026-125703CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2569129CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11585CNA: redhat
- https://gstreamer.freedesktop.org/security/sa-2026-0029.htmlCNA: redhat
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