Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3981
Advisory Released Date: 2026-10-12
Advisory Updated Date: 2026-10-12
Severity:
Important
Issue Overview:
A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while building the NTLM authenticate response. This may lead to remote code execution depending on stack-frame layout, or to authentication failure or process termination under memory hardening. (CVE-2026-94184)
Affected Packages:
fetchmail
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 fetchmail or yum update --advisory ALAS2-2026-3981 to update your system.
New Packages:
aarch64:
fetchmail-6.3.24-7.amzn2.0.3.aarch64
fetchmail-debuginfo-6.3.24-7.amzn2.0.3.aarch64
i686:
fetchmail-6.3.24-7.amzn2.0.3.i686
fetchmail-debuginfo-6.3.24-7.amzn2.0.3.i686
src:
fetchmail-6.3.24-7.amzn2.0.3.src
x86_64:
fetchmail-6.3.24-7.amzn2.0.3.x86_64
fetchmail-debuginfo-6.3.24-7.amzn2.0.3.x86_64