ALAS2-2026-3875

Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3875
Advisory Released Date: 2026-08-31
Advisory Updated Date: 2026-08-31
Severity: Important
Issue Overview:

A flaw was found in dracut. The die() error-handling function writes its message into a shell script under the initramfs emergency-hook directory without properly shell-quoting it. When the message contains data derived from the DHCP ROOT_PATH option, an attacker on the adjacent network who controls a rogue DHCP server can inject a command-substitution sequence that executes as root the next time dracut sources its emergency hook scripts during standard boot-failure handling. (CVE-2026-15816)


Affected Packages:

dracut


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 dracut or yum update --advisory ALAS2-2026-3875 to update your system.

New Packages:
aarch64:
    dracut-033-535.amzn2.1.8.aarch64
    dracut-network-033-535.amzn2.1.8.aarch64
    dracut-fips-033-535.amzn2.1.8.aarch64
    dracut-fips-aesni-033-535.amzn2.1.8.aarch64
    dracut-caps-033-535.amzn2.1.8.aarch64
    dracut-config-generic-033-535.amzn2.1.8.aarch64
    dracut-config-rescue-033-535.amzn2.1.8.aarch64
    dracut-tools-033-535.amzn2.1.8.aarch64
    dracut-debuginfo-033-535.amzn2.1.8.aarch64

i686:
    dracut-033-535.amzn2.1.8.i686
    dracut-network-033-535.amzn2.1.8.i686
    dracut-fips-033-535.amzn2.1.8.i686
    dracut-fips-aesni-033-535.amzn2.1.8.i686
    dracut-caps-033-535.amzn2.1.8.i686
    dracut-config-generic-033-535.amzn2.1.8.i686
    dracut-config-rescue-033-535.amzn2.1.8.i686
    dracut-tools-033-535.amzn2.1.8.i686
    dracut-debuginfo-033-535.amzn2.1.8.i686

src:
    dracut-033-535.amzn2.1.8.src

x86_64:
    dracut-033-535.amzn2.1.8.x86_64
    dracut-network-033-535.amzn2.1.8.x86_64
    dracut-fips-033-535.amzn2.1.8.x86_64
    dracut-fips-aesni-033-535.amzn2.1.8.x86_64
    dracut-caps-033-535.amzn2.1.8.x86_64
    dracut-config-generic-033-535.amzn2.1.8.x86_64
    dracut-config-rescue-033-535.amzn2.1.8.x86_64
    dracut-tools-033-535.amzn2.1.8.x86_64
    dracut-debuginfo-033-535.amzn2.1.8.x86_64

Additional References

Red Hat: CVE-2026-15816

Mitre: CVE-2026-15816