Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-4094
Advisory Released Date: 2026-11-12
Advisory Updated Date: 2026-11-12
FAQs regarding Amazon Linux ALAS/CVE Severity
A flaw was found in GStreamer's gst-plugins-bad H.265 video parser. When parsing a specially crafted H.265 bitstream containing a Screen Content Coding (SCC) extension with certain palette predictor initializer settings, an integer underflow in the upper-bound computation allows the parser to accept an out-of-range value for the number of palette predictor entries. This causes the parser to write beyond the end of a fixed-size array, resulting in memory corruption and an application crash. Successful exploitation requires an attacker to provide a malformed H.265 media file to a vulnerable application, and is limited to a denial-of-service impact. (CVE-2026-119727)
A flaw was found in the H.264 video parser in gst-plugins-bad. When processing a specially crafted H.264 video file with malformed Multiview (MVC) Sequence Parameter Set data, the parser can dereference a NULL pointer during the cleanup of partially allocated internal structures after a parse failure. This can cause the application using GStreamer to crash, resulting in a denial of service. (CVE-2026-119728)
A flaw was found in GStreamer. An integer overflow vulnerability in the AV1 LEB128 variable-length integer parser allows a remote attacker to cause a crash in applications that process AV1 media content. By crafting a malformed AV1 bitstream containing an invalid LEB128-encoded value, an attacker can cause integer overflow in the parser, resulting in incorrect length values being used during stream processing, which can lead to a denial of service. (CVE-2026-119729)
Affected Packages:
gstreamer1-plugins-bad-free
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-bad-free or yum update --advisory ALAS2-2026-4094 to update your system.
aarch64:
gstreamer1-plugins-bad-free-1.18.4-5.amzn2.0.10.aarch64
gstreamer1-plugins-bad-free-devel-1.18.4-5.amzn2.0.10.aarch64
gstreamer1-plugins-bad-free-debuginfo-1.18.4-5.amzn2.0.10.aarch64
i686:
gstreamer1-plugins-bad-free-1.18.4-5.amzn2.0.10.i686
gstreamer1-plugins-bad-free-devel-1.18.4-5.amzn2.0.10.i686
gstreamer1-plugins-bad-free-debuginfo-1.18.4-5.amzn2.0.10.i686
src:
gstreamer1-plugins-bad-free-1.18.4-5.amzn2.0.10.src
x86_64:
gstreamer1-plugins-bad-free-1.18.4-5.amzn2.0.10.x86_64
gstreamer1-plugins-bad-free-devel-1.18.4-5.amzn2.0.10.x86_64
gstreamer1-plugins-bad-free-debuginfo-1.18.4-5.amzn2.0.10.x86_64