Amazon Linux 2027 Preview Security Advisory: ALAS2027-2026-218
Advisory Release Date: 2026-10-26 09:00 Pacific
Advisory Updated Date: 2026-10-26 09:00 Pacific
Severity:
Important
Issue Overview:
Package updates are available for Amazon Linux 2027 that fix the following vulnerabilities:
CVE-2026-84790:
When using the OpenSSL library, we escaped embedded null-bytes in a certificate's subject in x509_get_subject(), but in extract_x509_field_ssl(), we copied any null-bytes that are contained in the field value. When using the option --verify-x509-name, this could lead to an incorrect name being accepted. For example, the common name "admin\0impersonator" would be accepted when running with --verify-x509-name admin name.
Fixed by: https://github.com/OpenVPN/openvpn/commit/cf4384eef4676a01bd3ee98fa602f7b2af8079ea (v2.7.8)
Affected Packages:
openvpn
Issue Correction:
Run dnf update openvpn or dnf update --advisory ALAS2027-2026-218 to update your system.
New Packages:
aarch64:
openvpn-devel-2.7.6-2.amzn2027.aarch64
openvpn-debuginfo-2.7.6-2.amzn2027.aarch64
openvpn-2.7.6-2.amzn2027.aarch64
openvpn-debugsource-2.7.6-2.amzn2027.aarch64
src:
openvpn-2.7.6-2.amzn2027.src
x86_64:
openvpn-debuginfo-2.7.6-2.amzn2027.x86_64
openvpn-devel-2.7.6-2.amzn2027.x86_64
openvpn-debugsource-2.7.6-2.amzn2027.x86_64
openvpn-2.7.6-2.amzn2027.x86_64