Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-4032
Advisory Released Date: 2026-10-24
Advisory Updated Date: 2026-10-26
A flaw was found in cifs-utils. This flaw allows an unprivileged local user to achieve privilege escalation. When a privileged service mounts a Common Internet File System (CIFS) share using a user-controlled credentials file, input values are not properly sanitized before being assembled into mount options. A local attacker can exploit this vulnerability to inject unauthorized mount options, allowing them to bypass permission checks and execute files with administrative (root) privileges. (CVE-2026-104715)
Affected Packages:
cifs-utils
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 cifs-utils or yum update --advisory ALAS2-2026-4032 to update your system.
aarch64:
cifs-utils-6.2-10.amzn2.0.5.aarch64
cifs-utils-devel-6.2-10.amzn2.0.5.aarch64
cifs-utils-debuginfo-6.2-10.amzn2.0.5.aarch64
i686:
cifs-utils-6.2-10.amzn2.0.5.i686
cifs-utils-devel-6.2-10.amzn2.0.5.i686
cifs-utils-debuginfo-6.2-10.amzn2.0.5.i686
src:
cifs-utils-6.2-10.amzn2.0.5.src
x86_64:
cifs-utils-6.2-10.amzn2.0.5.x86_64
cifs-utils-devel-6.2-10.amzn2.0.5.x86_64
cifs-utils-debuginfo-6.2-10.amzn2.0.5.x86_64