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Fencer Vulns
high 8.4

CVE-2026-86476 json

Gstreamer1-plugins-base: gst-plugins-base: heap buffer overflow via unvalidated gstvideometa plane extents in gst_video_frame_map_id and video_meta_deserialize

published 2026-10-14 26 d ago modified 2026-11-05 4 d ago also EUVD-2026-100950

cvss
8.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

Summary

A flaw was found in gst-plugins-base. A heap buffer overflow can be triggered when processing video buffers whose attached GstVideoMeta metadata declares plane strides and offsets that exceed the actual backing memory allocation. The metadata is not range-checked during deserialization, and the video frame mapping code does not verify that the declared plane geometry fits within the buffer before allowing consumers to read or write video data. A local attacker who controls the sending side of a GStreamer inter-process IPC pipeline can deliver a crafted buffer carrying fabricated strides, causing the receiving process to read or write beyond heap boundaries. Successful exploitation can cause a denial of service or potentially allow code execution within the affected process.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-86476 updated cvss 8.4

gstreamer1-plugins-base: gst-plugins-base: heap buffer overflow via unvalidated GstVideoMeta plane extents in gst_video_frame_map_id and video_meta_deserialize

  • Red Hat Enterprise Linux 6 gstreamer-plugins-base Red Hat Enterprise Linux 7 gstreamer-plugins-base, gstreamer1-plugins-base, gstreamer-plugins-base-tools, gstreamer1-plugins-base-tools, gstreamer1-plugins-base 1.26.7-4.el10_3 Red Hat Enterprise Linux 8 gstreamer1-plugins-base, gstreamer1-plugins-base 1.26.7-4.el10_3 Red Hat Enterprise Linux 9 gstreamer1-plugins-base, gstreamer1-plugins-base-tools, gstreamer1-plugins-base 1.26.7-4.el10_3 Red Hat Enterprise Linux 10 gstreamer1-plugins-base 1.26.7-4.el10_3
    affected: workaround, no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
25 d ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.