ALAS2-2026-3790

References: CVE-2026-52718  CVE-2026-52721  CVE-2026-52722 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

A denial of service vulnerability was found in GStreamer's AV1 codec parser in gst-plugins-bad. The gst_av1_parser_parse_tile_list_obu() function passes a byte count to a bit-reader API that expects a bit count, causing parser desynchronization. A remote attacker could trick a user into opening a specially crafted AV1 media file, triggering an assertion abort and causing the application to crash. (CVE-2026-52718)

Multiple out-of-bounds read vulnerabilities were found in GStreamer's pcapparse element. Malformed PCAP records can trigger reads beyond buffer boundaries during IPv4/TCP header parsing. This element is primarily used in debugging pipelines, limiting real-world exposure. A local attacker could trick a user into processing a specially crafted PCAP file, potentially leading to a crash or information disclosure. (CVE-2026-52721)

A signed integer overflow vulnerability was found in GStreamer's VMnc decoder. A crafted VMnc stream with large cursor dimensions can overflow signed integer payload-size arithmetic, bypassing a length check and leading to out-of-bounds reads. A remote attacker could trick a user into opening a specially crafted VMnc file, potentially causing a crash or information disclosure. (CVE-2026-52722)

Issue Correction:
Run yum update gstreamer1-plugins-bad-free or yum update --advisory ALAS2-2026-3790 to update your system.

New Packages:

aarch64:
    gstreamer1-plugins-bad-free-1.18.4-5.amzn2.0.6.aarch64
    gstreamer1-plugins-bad-free-devel-1.18.4-5.amzn2.0.6.aarch64
    gstreamer1-plugins-bad-free-debuginfo-1.18.4-5.amzn2.0.6.aarch64

src:
    gstreamer1-plugins-bad-free-1.18.4-5.amzn2.0.6.src

x86_64:
    gstreamer1-plugins-bad-free-1.18.4-5.amzn2.0.6.x86_64
    gstreamer1-plugins-bad-free-devel-1.18.4-5.amzn2.0.6.x86_64
    gstreamer1-plugins-bad-free-debuginfo-1.18.4-5.amzn2.0.6.x86_64