Amazon Linux 2023 Security Advisory: ALAS2023-2026-1813
Advisory Released Date: 2026-06-08
Advisory Updated Date: 2026-06-08
Severity:
Important
Issue Overview:
When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0. (CVE-2026-33814)
Affected Packages:
amazon-ssm-agent
Issue Correction:
Run dnf update amazon-ssm-agent --releasever 2023.12.20260608 or dnf update --advisory ALAS2023-2026-1813 --releasever 2023.12.20260608 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:
amazon-ssm-agent-3.3.4515.0-1.amzn2023.aarch64
src:
amazon-ssm-agent-3.3.4515.0-1.amzn2023.src
x86_64:
amazon-ssm-agent-3.3.4515.0-1.amzn2023.x86_64