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Fencer Vulns
high 7.8

CVE-2026-2920 json

GStreamer ASF Demuxer Heap-based Buffer Overflow Remote Code Execution Vulnerability

published 2026-03-13 7 mo ago modified 2026-07-21 3 mo ago also EUVD-2026-12113

cvss
7.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

GStreamer ASF Demuxer Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.

The specific flaw exists within the processing of stream headers within ASF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28843.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:1.24.11-2.el10_1, 0:1.24.11-3.el10_1, 0:1.26.7-2.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.24.11-1.el10_0.1, 0:1.24.11-1.el10_0.2, 0:1.24.11-3.el10_0
  • Red Hat Red Hat Enterprise Linux 8 0:1.16.1-6.el8_10
  • Red Hat Red Hat Enterprise Linux 9 0:1.22.12-4.el9_7, 0:1.22.12-5.el9_7, 0:1.22.12-6.el9_8, 0:1.22.12-7.el9_8, 0:1.22.12-8.el9_8
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.22.12-4.el9_6, 0:1.22.12-5.el9_6
  • gst-plugins-ugly1.0 Debian 12 1.22.0-2+deb12u2
  • gst-plugins-ugly1.0 Debian 13 1.26.3-4+deb13u1
  • gst-plugins-ugly1.0 Debian 14 1.28.1-1

debian advisories DEBIAN-CVE-2026-2920

  • gst-plugins-ugly1.0 Ubuntu Pro 16.04 LTS 1.8.3-1ubuntu0.1+esm2
  • gst-plugins-ugly1.0 Ubuntu Pro 18.04 LTS 1.14.5-0ubuntu1~18.04.1+esm1
  • gst-plugins-ugly1.0 Ubuntu Pro 20.04 LTS 1.16.2-2ubuntu0.1~esm1
  • gst-plugins-ugly1.0 Ubuntu Pro 22.04 LTS 1.20.1-1ubuntu0.1~esm1
  • gst-plugins-ugly1.0 Ubuntu Pro 24.04 LTS 1.24.1-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2026-2920

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gstreamer1-plugins-ugly-free RHEL 9 1.22.12-6.el9_8
  • gstreamer1-plugins-base RHEL 9 1.22.12-8.el9_8
  • gstreamer1-plugins-good RHEL 9 1.22.12-7.el9_8
  • gstreamer1-plugins-bad-free RHEL 9 1.22.12-7.el9_8
  • gstreamer1-plugins-good-gtk RHEL 9 1.22.12-7.el9_8
  • gstreamer1-plugins-base-tools RHEL 9 1.22.12-8.el9_8
  • gstreamer1-plugins-bad-free-libs RHEL 9 1.22.12-7.el9_8
  • gstreamer1-plugins-ugly-free RHEL 10.2 1.26.7-2.el10_2

red hat advisories RHSA-2026:19180RHSA-2026:19024RHSA-2026:8862RHSA-2026:8854RHSA-2026:6750RHSA-2026:6300

  • gstreamer-plugins-ugly SLE Workstation Extension 15 SP7, openSUSE Leap 15.6 1.24.0-150600.3.5.1
  • gstreamer-plugins-ugly SLES for SAP applications 16.0, SLES 16.0 1.26.7-160000.2.1

suse advisories SUSE-SU-2026:0998-1SUSE-SU-2026:20915-1

  • gstreamer-plugins-ugly openSUSE Leap 16.0 1.26.7-160000.2.1

opensuse advisories openSUSE-SU-2026:20402-1

  • gstreamer1-plugins-ugly-free AlmaLinux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-base AlmaLinux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-good AlmaLinux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-bad-free AlmaLinux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-good-gtk AlmaLinux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-base-tools AlmaLinux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-bad-free-libs AlmaLinux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-ugly-free AlmaLinux 9 1.22.12-6.el9_8

almalinux advisories ALSA-2026:19024ALSA-2026:19180ALSA-2026:6750ALSA-2026:6259ALSA-2026:6300

  • gstreamer1-plugins-ugly-free Rocky Linux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-base Rocky Linux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-good Rocky Linux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-bad-free Rocky Linux 10 1.26.7-2.el10_2
  • gstreamer1-plugins-ugly-free Rocky Linux 9 1.22.12-6.el9_8
  • gstreamer1-plugins-base Rocky Linux 9 1.22.12-8.el9_8
  • gstreamer1-plugins-good Rocky Linux 9 1.22.12-7.el9_8
  • gstreamer1-plugins-bad-free Rocky Linux 9 1.22.12-7.el9_8

rocky linux advisories RLSA-2026:19024RLSA-2026:19180RLSA-2026:6259RLSA-2026:6750RLSA-2026:6300

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-2026-2920 updated cvss 7.8

gstreamer-plugins-ugly: GStreamer: Arbitrary code execution via ASF file processing

  • Red Hat CodeReady Linux Builder EUS (v.9.6) gstreamer1-plugins-bad-free-devel 1.22.12-5.el9_6, gstreamer1-plugins-bad-free-debuginfo 1.22.12-5.el9_6, gstreamer1-plugins-bad-free-debugsource 1.22.12-5.el9_6, gstreamer1-plugins-bad-free-libs-debuginfo 1.22.12-5.el9_6
    fixed: vendor fix RHSA-2026:8862
  • Red Hat Enterprise Linux AppStream (v. 8) gstreamer1-plugins-base 1.16.1-6.el8_10, gstreamer1-plugins-good 1.16.1-6.el8_10, gstreamer1-plugins-bad-free 1.16.1-6.el8_10, gstreamer1-plugins-good-gtk 1.16.1-6.el8_10
    fixed: vendor fix RHSA-2026:6750
  • Red Hat Enterprise Linux AppStream (v. 9) gstreamer1-plugins-base 1.22.12-5.el9_7, gstreamer1-plugins-base 1.22.12-8.el9_8, gstreamer1-plugins-good 1.22.12-5.el9_7, gstreamer1-plugins-good 1.22.12-7.el9_8, gstreamer1-plugins-bad-free 1.22.12-5.el9_7, gstreamer1-plugins-bad-free 1.22.12-7.el9_8, +8 more
    fixed: vendor fix RHSA-2026:6300
  • Red Hat Enterprise Linux AppStream (v. 10) gstreamer1-plugins-base 1.26.7-2.el10_2, gstreamer1-plugins-good 1.26.7-2.el10_2, gstreamer1-plugins-base 1.24.11-2.el10_1, gstreamer1-plugins-good 1.24.11-2.el10_1, gstreamer1-plugins-bad-free 1.26.7-2.el10_2, gstreamer1-plugins-good-gtk 1.26.7-2.el10_2, +8 more
    fixed: vendor fix RHSA-2026:6259
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) gstreamer1-plugins-base 1.24.11-1.el10_0.1, gstreamer1-plugins-good 1.24.11-1.el10_0.2, gstreamer1-plugins-bad-free 1.24.11-3.el10_0, gstreamer1-plugins-good-gtk 1.24.11-1.el10_0.2, gstreamer1-plugins-ugly-free 1.24.11-1.el10_0.1, gstreamer1-plugins-base-tools 1.24.11-1.el10_0.1, +1 more
    fixed: vendor fix RHSA-2026:8854
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) gstreamer1-plugins-base 1.22.12-5.el9_6, gstreamer1-plugins-good 1.22.12-5.el9_6, gstreamer1-plugins-bad-free 1.22.12-5.el9_6, gstreamer1-plugins-good-gtk 1.22.12-5.el9_6, gstreamer1-plugins-ugly-free 1.22.12-4.el9_6, gstreamer1-plugins-base-tools 1.22.12-5.el9_6, +1 more
    fixed: vendor fix RHSA-2026:8862
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) gstreamer1-plugins-bad-free-devel 1.22.12-5.el9_7, gstreamer1-plugins-bad-free-devel 1.22.12-7.el9_8, gstreamer1-plugins-bad-free-debuginfo 1.22.12-5.el9_7, gstreamer1-plugins-bad-free-debuginfo 1.22.12-7.el9_8, gstreamer1-plugins-bad-free-debugsource 1.22.12-5.el9_7, gstreamer1-plugins-bad-free-debugsource 1.22.12-7.el9_8, +2 more
    fixed: vendor fix RHSA-2026:6300
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) gstreamer1-plugins-bad-free-devel 1.26.7-2.el10_2, gstreamer1-plugins-bad-free-devel 1.24.11-3.el10_1, gstreamer1-plugins-bad-free-debuginfo 1.26.7-2.el10_2, gstreamer1-plugins-bad-free-debuginfo 1.24.11-3.el10_1, gstreamer1-plugins-bad-free-debugsource 1.26.7-2.el10_2, gstreamer1-plugins-bad-free-debugsource 1.24.11-3.el10_1, +2 more
    fixed: vendor fix RHSA-2026:6259
show 4 more
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) gstreamer1-plugins-bad-free-devel 1.24.11-3.el10_0, gstreamer1-plugins-bad-free-debuginfo 1.24.11-3.el10_0, gstreamer1-plugins-bad-free-debugsource 1.24.11-3.el10_0, gstreamer1-plugins-bad-free-libs-debuginfo 1.24.11-3.el10_0
    fixed: vendor fix RHSA-2026:8854
  • Red Hat Enterprise Linux CRB (v. 8) gstreamer1-plugins-bad-free-devel 1.16.1-6.el8_10, gstreamer1-plugins-bad-free-debuginfo 1.16.1-6.el8_10, gstreamer1-plugins-bad-free-debugsource 1.16.1-6.el8_10
    fixed: vendor fix RHSA-2026:6750
  • Red Hat Enterprise Linux 6 gstreamer, gstreamer-tools Red Hat Enterprise Linux 7 gstreamer, gstreamer-tools, gstreamer1-plugins-ugly-free
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 8 gstreamer1-plugins-ugly-free
    not affected: component not present

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
7 mo ago

Exploit prediction

0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • GStreamer GStreamer
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow
  • CWE-120 Buffer Copy without Checking Size of Input

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.