Skip to content
Fencer Intel
high 7.8

CVE-2026-2923 json

GStreamer DVB Subtitles Out-Of-Bounds Write Remote Code Execution Vulnerability

published 7mo ago modified 3mo ago also EUVD-2026-12119

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 58%
public exploits
0
none known

Summary

GStreamer DVB Subtitles Out-Of-Bounds Write 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 handling of coordinates. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28838.

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-bad1.0 Debian 12 1.22.0-4+deb12u7
  • gst-plugins-bad1.0 Debian 13 1.26.2-3+deb13u1
  • gst-plugins-bad1.0 Debian 14 1.28.1-1

debian advisories DEBIAN-CVE-2026-2923

  • 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

  • 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

Is CVE-2026-2923 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2026-2923 updated cvss 7.8

gstreamer-plugins-bad: GStreamer: Remote Code Execution via out-of-bounds write in DVB Subtitles handling

  • 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 “To mitigate this issue, avoid processing untrusted DVB subtitle streams with GStreamer. Limiting exposure to untrusted content can reduce the risk of exploitation.” 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 “To mitigate this issue, avoid processing untrusted DVB subtitle streams with GStreamer. Limiting exposure to untrusted content can reduce the risk of exploitation.” 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 “To mitigate this issue, avoid processing untrusted DVB subtitle streams with GStreamer. Limiting exposure to untrusted content can reduce the risk of exploitation.” 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 “To mitigate this issue, avoid processing untrusted DVB subtitle streams with GStreamer. Limiting exposure to untrusted content can reduce the risk of exploitation.” 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 “To mitigate this issue, avoid processing untrusted DVB subtitle streams with GStreamer. Limiting exposure to untrusted content can reduce the risk of exploitation.” 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 “To mitigate this issue, avoid processing untrusted DVB subtitle streams with GStreamer. Limiting exposure to untrusted content can reduce the risk of exploitation.” 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 “To mitigate this issue, avoid processing untrusted DVB subtitle streams with GStreamer. Limiting exposure to untrusted content can reduce the risk of exploitation.” 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 “To mitigate this issue, avoid processing untrusted DVB subtitle streams with GStreamer. Limiting exposure to untrusted content can reduce the risk of exploitation.” RHSA-2026:6259
show 3 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 “To mitigate this issue, avoid processing untrusted DVB subtitle streams with GStreamer. Limiting exposure to untrusted content can reduce the risk of exploitation.” 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 “To mitigate this issue, avoid processing untrusted DVB subtitle streams with GStreamer. Limiting exposure to untrusted content can reduce the risk of exploitation.” RHSA-2026:6750
  • Red Hat Enterprise Linux 6 gstreamer-plugins-bad-free, gstreamer-plugins-bad-free-extras Red Hat Enterprise Linux 7 gstreamer-plugins-bad-free, gstreamer1-plugins-bad-free, gstreamer1-plugins-bad-free-gtk Red Hat Enterprise Linux 8 mingw-gstreamer1-plugins-bad-free, mingw32-gstreamer1-plugins-bad-free, mingw64-gstreamer1-plugins-bad-free
    not affected: vulnerable code 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
7mo ago

Exploit prediction

0.86% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-09).

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

References

Sources

Fencer Intel 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.