Amazon Linux 2 Security Advisory: ALAS2-2026-3350
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
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update amazon-ssm-agent or yum update --advisory ALAS2-2026-3350 to update your system.
New Packages:
aarch64:
amazon-ssm-agent-3.3.4515.0-1.amzn2.aarch64
src:
amazon-ssm-agent-3.3.4515.0-1.amzn2.src
x86_64:
amazon-ssm-agent-3.3.4515.0-1.amzn2.x86_64