Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3972
Advisory Released Date: 2026-10-12
Advisory Updated Date: 2026-10-12
Severity:
Important
Issue Overview:
A flaw was found in rpcbind. This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a large number of unique requests. The rpcbind service records previously unseen RPC (Remote Procedure Call) statistics in unbounded in-memory lists, leading to persistent memory growth and increased CPU usage. This can degrade or exhaust service availability. (CVE-2026-94640)
Affected Packages:
rpcbind
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 rpcbind or yum update --advisory ALAS2-2026-3972 to update your system.
New Packages:
aarch64:
rpcbind-0.2.0-45.amzn2.aarch64
rpcbind-debuginfo-0.2.0-45.amzn2.aarch64
i686:
rpcbind-0.2.0-45.amzn2.i686
rpcbind-debuginfo-0.2.0-45.amzn2.i686
src:
rpcbind-0.2.0-45.amzn2.src
x86_64:
rpcbind-0.2.0-45.amzn2.x86_64
rpcbind-debuginfo-0.2.0-45.amzn2.x86_64