Amazon Linux 2 Security Advisory: ALAS2ECS-2025-092
Advisory Released Date: 2026-01-05
Advisory Updated Date: 2026-01-05
A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with "token too long" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions < 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged. (CVE-2025-65637)
Affected Packages:
ecs-init
Note:
This advisory is applicable to Amazon Linux 2 - Ecs Extra. Visit this page to learn more about Amazon Linux 2 (AL2) Extras and this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update ecs-init or yum update --advisory ALAS2ECS-2025-092 to update your system.
aarch64:
ecs-init-1.82.2-1.amzn2.aarch64
src:
ecs-init-1.82.2-1.amzn2.src
x86_64:
ecs-init-1.82.2-1.amzn2.x86_64