Amazon Linux 2027 Preview Security Advisory: ALAS2027-2026-300
Advisory Released Date: 2026-11-02
Advisory Updated Date: 2026-11-02
Severity:
Medium
Issue Overview:
Package updates are available for Amazon Linux 2027 that fix the following vulnerabilities:
CVE-2026-76781:
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).
Affected Packages:
libxml2
Issue Correction:
Run dnf update libxml2 --releasever 2027.0.20261102 or dnf update --advisory ALAS2027-2026-300 --releasever 2027.0.20261102 to update your system.
New Packages:
aarch64:
libxml2-static-2.12.10-5.amzn2027.0.3.aarch64
libxml2-debuginfo-2.12.10-5.amzn2027.0.3.aarch64
python3-libxml2-debuginfo-2.12.10-5.amzn2027.0.3.aarch64
libxml2-debugsource-2.12.10-5.amzn2027.0.3.aarch64
libxml2-devel-2.12.10-5.amzn2027.0.3.aarch64
python3-libxml2-2.12.10-5.amzn2027.0.3.aarch64
libxml2-2.12.10-5.amzn2027.0.3.aarch64
src:
libxml2-2.12.10-5.amzn2027.0.3.src
x86_64:
python3-libxml2-debuginfo-2.12.10-5.amzn2027.0.3.x86_64
libxml2-static-2.12.10-5.amzn2027.0.3.x86_64
libxml2-debugsource-2.12.10-5.amzn2027.0.3.x86_64
libxml2-devel-2.12.10-5.amzn2027.0.3.x86_64
libxml2-debuginfo-2.12.10-5.amzn2027.0.3.x86_64
python3-libxml2-2.12.10-5.amzn2027.0.3.x86_64
libxml2-2.12.10-5.amzn2027.0.3.x86_64