Amazon Linux 2023 Security Advisory: ALAS2023-2026-3341
Advisory Released Date: 2026-10-30
Advisory Updated Date: 2026-11-02
Severity:
Medium
Issue Overview:
A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS). (CVE-2026-76781)
Affected Packages:
libxml2
Issue Correction:
Run dnf update libxml2 --releasever 2023.12.20261102 or dnf update --advisory ALAS2023-2026-3341 --releasever 2023.12.20261102 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
libxml2-static-2.10.4-1.amzn2023.0.22.aarch64
libxml2-debugsource-2.10.4-1.amzn2023.0.22.aarch64
python3-libxml2-debuginfo-2.10.4-1.amzn2023.0.22.aarch64
libxml2-debuginfo-2.10.4-1.amzn2023.0.22.aarch64
libxml2-devel-2.10.4-1.amzn2023.0.22.aarch64
python3-libxml2-2.10.4-1.amzn2023.0.22.aarch64
libxml2-2.10.4-1.amzn2023.0.22.aarch64
src:
libxml2-2.10.4-1.amzn2023.0.22.src
x86_64:
python3-libxml2-debuginfo-2.10.4-1.amzn2023.0.22.x86_64
libxml2-static-2.10.4-1.amzn2023.0.22.x86_64
libxml2-debuginfo-2.10.4-1.amzn2023.0.22.x86_64
python3-libxml2-2.10.4-1.amzn2023.0.22.x86_64
libxml2-2.10.4-1.amzn2023.0.22.x86_64
libxml2-devel-2.10.4-1.amzn2023.0.22.x86_64
libxml2-debugsource-2.10.4-1.amzn2023.0.22.x86_64