Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3899
Advisory Released Date: 2026-08-31
Advisory Updated Date: 2026-08-31
GStreamer MRF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of MRF files. 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-29510. (CVE-2026-18295)
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. (CVE-2026-18649)
Affected Packages:
gstreamer1-plugins-good
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update gstreamer1-plugins-good or yum update --advisory ALAS2-2026-3899 to update your system.
aarch64:
gstreamer1-plugins-good-1.18.4-6.amzn2.0.13.aarch64
gstreamer1-plugins-good-gtk-1.18.4-6.amzn2.0.13.aarch64
gstreamer1-plugins-good-debuginfo-1.18.4-6.amzn2.0.13.aarch64
i686:
gstreamer1-plugins-good-1.18.4-6.amzn2.0.13.i686
gstreamer1-plugins-good-gtk-1.18.4-6.amzn2.0.13.i686
gstreamer1-plugins-good-debuginfo-1.18.4-6.amzn2.0.13.i686
src:
gstreamer1-plugins-good-1.18.4-6.amzn2.0.13.src
x86_64:
gstreamer1-plugins-good-1.18.4-6.amzn2.0.13.x86_64
gstreamer1-plugins-good-gtk-1.18.4-6.amzn2.0.13.x86_64
gstreamer1-plugins-good-debuginfo-1.18.4-6.amzn2.0.13.x86_64