Amazon Linux 2 Security Advisory: ALAS2-2026-3831
Advisory Released Date: 2026-08-04
Advisory Updated Date: 2026-08-04
Severity:
Important
Issue Overview:
A flaw was found in the `acl` component, specifically within its `libacl` pathname-based functions. A local attacker could exploit this vulnerability by using a symbolic link to replace a pathname component. This could allow the attacker to redirect access control list (ACL) read or write operations to arbitrary files or directories, leading to unauthorized manipulation of ACLs and ultimately local privilege escalation. (CVE-2026-54369)
Affected Packages:
acl
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 acl or yum update --advisory ALAS2-2026-3831 to update your system.
New Packages:
aarch64:
acl-2.2.51-14.amzn2.0.1.aarch64
libacl-2.2.51-14.amzn2.0.1.aarch64
libacl-devel-2.2.51-14.amzn2.0.1.aarch64
acl-debuginfo-2.2.51-14.amzn2.0.1.aarch64
i686:
acl-2.2.51-14.amzn2.0.1.i686
libacl-2.2.51-14.amzn2.0.1.i686
libacl-devel-2.2.51-14.amzn2.0.1.i686
acl-debuginfo-2.2.51-14.amzn2.0.1.i686
src:
acl-2.2.51-14.amzn2.0.1.src
x86_64:
acl-2.2.51-14.amzn2.0.1.x86_64
libacl-2.2.51-14.amzn2.0.1.x86_64
libacl-devel-2.2.51-14.amzn2.0.1.x86_64
acl-debuginfo-2.2.51-14.amzn2.0.1.x86_64