CVE-2026-18649

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

State: Published
Severity: 7.5 High
Published: Aug 6, 2026
Updated: Sep 23, 2026
Reserved: Aug 3, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
Red Hat Enterprise Linux 10Red Hat	0:1.26.7-2.el10_2.3 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat	0:1.24.11-1.el10_0.4 and laterNot affected
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat	0:1.10.4-4.el7_9.3 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:1.16.1-7.el8_10.3 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat	0:1.16.1-4.el8_4.2 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat	0:1.16.1-4.el8_4.2 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat	0:1.16.1-4.el8_6.3 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat	0:1.16.1-4.el8_6.3 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat	0:1.16.1-5.el8_8.3 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat	0:1.16.1-5.el8_8.3 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:1.22.12-7.el9_8.2 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat	0:1.18.4-8.el9_2.2 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat	0:1.22.1-4.el9_4.2 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:1.22.12-5.el9_6.2 and laterNot affected

References

https://0xsemizzz.vercel.app/projects/cve-2026-18649-gstreamer-rtp-dos/
RHSA-2026:53451vendor-advisory
RHSA-2026:53452vendor-advisory
RHSA-2026:56966vendor-advisory
RHSA-2026:61588vendor-advisory
RHSA-2026:61943vendor-advisory
RHSA-2026:65959vendor-advisory
RHSA-2026:65999vendor-advisory
RHSA-2026:69232vendor-advisory
RHSA-2026:70264vendor-advisory
RHSA-2026:70584vendor-advisory
RHSA-2026:70803vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-18649vdb-entry
RHBZ#2510614issue-tracking
https://github.com/0xSemizzz/CVE-2026-18649
https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/113

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