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Fencer Vulns
high 7.5

CVE-2026-18649 json

Gstreamer1-plugins-good: gst-plugins-good: unbounded memory growth in rtph264depay and rtph265depay rtp depayloaders

published 2026-08-06 3 mo ago modified 2026-09-23 46 d ago also EUVD-2026-53768

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

A flaw was found in the GStreamer gst-plugins-good package. The rtph264depay and rtph265depay RTP depayloader elements do not enforce a maximum size limit on the reassembly buffer used during fragmented RTP packet processing. A remote, unauthenticated attacker can send a continuous stream of RTP fragments without ever transmitting an end-of-fragment marker, causing the reassembly buffer to grow without bound until process memory is exhausted. This results in a denial of service through process termination.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:1.26.7-2.el10_2.3
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.24.11-1.el10_0.4
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.10.4-4.el7_9.3
  • Red Hat Red Hat Enterprise Linux 8 0:1.16.1-7.el8_10.3
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.16.1-4.el8_4.2
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:1.16.1-4.el8_4.2
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:1.16.1-4.el8_6.3
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:1.16.1-4.el8_6.3
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:1.16.1-5.el8_8.3
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:1.16.1-5.el8_8.3
  • Red Hat Red Hat Enterprise Linux 9 0:1.22.12-7.el9_8.2
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.18.4-8.el9_2.2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:1.22.1-4.el9_4.2
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.22.12-5.el9_6.2
  • gst-plugins-good1.0 Debian 14 1.28.6-1

debian advisories DEBIAN-CVE-2026-18649

  • gst-plugins-good1.0 Ubuntu 22.04 LTS 1.20.3-0ubuntu1.8
  • gst-plugins-good1.0 Ubuntu 24.04 LTS 1.24.2-1ubuntu1.6
  • gst-plugins-good1.0 Ubuntu 26.04 LTS 1.28.2-2ubuntu0.2
  • gst-plugins-good1.0 Ubuntu Pro 16.04 LTS 1.8.3-1ubuntu0.5+esm2
  • gst-plugins-good1.0 Ubuntu Pro 18.04 LTS 1.14.5-0ubuntu1~18.04.3+esm2
  • gst-plugins-good1.0 Ubuntu Pro 20.04 LTS 1.16.3-0ubuntu1.3+esm2

ubuntu advisories UBUNTU-CVE-2026-18649

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-good RHEL 8 1.16.1-7.el8_10.3
  • gstreamer1-plugins-good-gtk RHEL 8 1.16.1-7.el8_10.3
  • gstreamer1-plugins-good RHEL 10.2 1.26.7-2.el10_2.3
  • gstreamer1-plugins-good-gtk RHEL 10.2 1.26.7-2.el10_2.3
  • gstreamer1-plugins-good RHEL 9 1.22.12-7.el9_8.2
  • gstreamer1-plugins-good-gtk RHEL 9 1.22.12-7.el9_8.2
  • gstreamer1-plugins-good RHEL 8.4 EUS_LONG_LIFE, RHEL 8.4 AUS 1.16.1-4.el8_4.2
  • gstreamer1-plugins-good-gtk RHEL 8.4 EUS_LONG_LIFE, RHEL 8.4 AUS 1.16.1-4.el8_4.2

red hat advisories RHSA-2026:70803RHSA-2026:70584RHSA-2026:70264RHSA-2026:69232RHSA-2026:65999RHSA-2026:65959

  • gstreamer1-plugins-good AlmaLinux 8 1.16.1-7.el8_10.3
  • gstreamer1-plugins-good-gtk AlmaLinux 8 1.16.1-7.el8_10.3
  • gstreamer1-plugins-good AlmaLinux 10 1.26.7-2.el10_2.3
  • gstreamer1-plugins-good-gtk AlmaLinux 10 1.26.7-2.el10_2.3
  • gstreamer1-plugins-good AlmaLinux 9 1.22.12-7.el9_8.2
  • gstreamer1-plugins-good-gtk AlmaLinux 9 1.22.12-7.el9_8.2

almalinux advisories ALSA-2026:56966ALSA-2026:53451ALSA-2026:53452

  • gstreamer1-plugins-good Rocky Linux 8 1.16.1-7.el8_10.3
  • gstreamer1-plugins-good Rocky Linux 10 1.26.7-2.el10_2.3
  • gstreamer1-plugins-good Rocky Linux 9 1.22.12-7.el9_8.2

rocky linux advisories RLSA-2026:56966RLSA-2026:53451RLSA-2026:53452

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-2026-18649 updated cvss 7.5

gstreamer1-plugins-good: gst-plugins-good: unbounded memory growth in rtph264depay and rtph265depay RTP depayloaders

  • Red Hat Enterprise Linux AppStream (v. 8) gstreamer1-plugins-good 1.16.1-7.el8_10.3, gstreamer1-plugins-good-gtk 1.16.1-7.el8_10.3
    fixed: vendor fix RHSA-2026:56966
  • Red Hat Enterprise Linux AppStream (v. 9) gstreamer1-plugins-good 1.22.12-7.el9_8.2, gstreamer1-plugins-good-gtk 1.22.12-7.el9_8.2
    fixed: vendor fix RHSA-2026:53452
  • Red Hat Enterprise Linux AppStream (v. 10) gstreamer1-plugins-good 1.26.7-2.el10_2.3, gstreamer1-plugins-good-gtk 1.26.7-2.el10_2.3
    fixed: vendor fix RHSA-2026:53451
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) gstreamer1-plugins-good 1.16.1-4.el8_4.2, gstreamer1-plugins-good-gtk 1.16.1-4.el8_4.2
    fixed: vendor fix RHSA-2026:70803
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) gstreamer1-plugins-good 1.16.1-4.el8_6.3, gstreamer1-plugins-good-gtk 1.16.1-4.el8_6.3
    fixed: vendor fix RHSA-2026:70584
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) gstreamer1-plugins-good 1.16.1-5.el8_8.3, gstreamer1-plugins-good-gtk 1.16.1-5.el8_8.3
    fixed: vendor fix RHSA-2026:69232
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) gstreamer1-plugins-good 1.18.4-8.el9_2.2, gstreamer1-plugins-good-gtk 1.18.4-8.el9_2.2
    fixed: vendor fix RHSA-2026:65999
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) gstreamer1-plugins-good 1.22.1-4.el9_4.2, gstreamer1-plugins-good-gtk 1.22.1-4.el9_4.2
    fixed: vendor fix RHSA-2026:61588
show 6 more
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) gstreamer1-plugins-good 1.24.11-1.el10_0.4, gstreamer1-plugins-good-gtk 1.24.11-1.el10_0.4
    fixed: vendor fix RHSA-2026:65959
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) gstreamer1-plugins-good 1.22.12-5.el9_6.2, gstreamer1-plugins-good-gtk 1.22.12-5.el9_6.2
    fixed: vendor fix RHSA-2026:61943
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) gstreamer1-plugins-good 1.16.1-4.el8_4.2, gstreamer1-plugins-good-gtk 1.16.1-4.el8_4.2
    fixed: vendor fix RHSA-2026:70803
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) gstreamer1-plugins-good 1.16.1-4.el8_6.3, gstreamer1-plugins-good-gtk 1.16.1-4.el8_6.3
    fixed: vendor fix RHSA-2026:70584
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) gstreamer1-plugins-good 1.16.1-5.el8_8.3, gstreamer1-plugins-good-gtk 1.16.1-5.el8_8.3
    fixed: vendor fix RHSA-2026:69232
  • Red Hat Enterprise Linux Server (v. 7 ELS) gstreamer1-plugins-good 1.10.4-4.el7_9.3
    fixed: vendor fix RHSA-2026:70264

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
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.96% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

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.