Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3930
Advisory Released Date: 2026-09-28
Advisory Updated Date: 2026-09-28
A NULL pointer dereference flaw was found in GStreamer's RTSP support library. The vulnerability occurs while parsing an Authorization or WWW-Authenticate header that uses Digest authentication. Specially crafted whitespace placement around a parameter's terminator can cause an internal length calculation to underflow, leading to a crash of the process parsing the header. On an RTSP server this can be triggered by a remote, unauthenticated attacker sending a single malformed request when the server has authentication enabled; the same flaw can also be triggered against an RTSP client by a malicious or compromised RTSP server. Successful exploitation results in a denial of service (application crash) and has no confirmed impact on confidentiality or integrity. (CVE-2026-85150)
Affected Packages:
gstreamer1-plugins-base
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-base or yum update --advisory ALAS2-2026-3930 to update your system.
aarch64:
gstreamer1-plugins-base-1.18.4-5.amzn2.0.12.aarch64
gstreamer1-plugins-base-tools-1.18.4-5.amzn2.0.12.aarch64
gstreamer1-plugins-base-devel-1.18.4-5.amzn2.0.12.aarch64
gstreamer1-plugins-base-debuginfo-1.18.4-5.amzn2.0.12.aarch64
i686:
gstreamer1-plugins-base-1.18.4-5.amzn2.0.12.i686
gstreamer1-plugins-base-tools-1.18.4-5.amzn2.0.12.i686
gstreamer1-plugins-base-devel-1.18.4-5.amzn2.0.12.i686
gstreamer1-plugins-base-debuginfo-1.18.4-5.amzn2.0.12.i686
src:
gstreamer1-plugins-base-1.18.4-5.amzn2.0.12.src
x86_64:
gstreamer1-plugins-base-1.18.4-5.amzn2.0.12.x86_64
gstreamer1-plugins-base-tools-1.18.4-5.amzn2.0.12.x86_64
gstreamer1-plugins-base-devel-1.18.4-5.amzn2.0.12.x86_64
gstreamer1-plugins-base-debuginfo-1.18.4-5.amzn2.0.12.x86_64