Amazon Linux 2 Security Advisory: ALAS2KERNEL-5.4-2026-120
Advisory Released Date: 2026-05-05
Advisory Updated Date: 2026-05-09
FAQs regarding Amazon Linux ALAS/CVE Severity
In the Linux kernel, the following vulnerability has been resolved:
crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec (CVE-2026-23060)
In the Linux kernel, the following vulnerability has been resolved:
crypto: algif_aead - Revert to operating out-of-place
To mitigate this issue, we recommend that customers disable loading of the algif_aead module by running the following commands as an administrator user:
echo "install algif_aead /bin/false" > /etc/modprobe.d/disable-algif.conf
rmmod algif_aead
Some Amazon Linux 2 systems on the ARM64 architecture may fail the above rmmod command as they have the algif_aead module built-in. In this case, the following command and a reboot will mitigate the issue:
sudo grubby --update-kernel ALL --args "initcall_blacklist=algif_aead_init" (CVE-2026-31431)
In the Linux kernel, the following vulnerability has been resolved:
crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption (CVE-2026-43033)
Affected Packages:
kernel
Note:
This advisory is applicable to Amazon Linux 2 - Kernel-5.4 Extra. Visit this page to learn more about Amazon Linux 2 (AL2) Extras and this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update kernel or yum update --advisory ALAS2KERNEL-5.4-2026-120 to update your system.
System reboot is required in order to complete this update.
aarch64:
kernel-5.4.302-223.469.amzn2.aarch64
kernel-headers-5.4.302-223.469.amzn2.aarch64
kernel-debuginfo-common-aarch64-5.4.302-223.469.amzn2.aarch64
perf-5.4.302-223.469.amzn2.aarch64
perf-debuginfo-5.4.302-223.469.amzn2.aarch64
python-perf-5.4.302-223.469.amzn2.aarch64
python-perf-debuginfo-5.4.302-223.469.amzn2.aarch64
kernel-tools-5.4.302-223.469.amzn2.aarch64
kernel-tools-devel-5.4.302-223.469.amzn2.aarch64
kernel-tools-debuginfo-5.4.302-223.469.amzn2.aarch64
bpftool-5.4.302-223.469.amzn2.aarch64
bpftool-debuginfo-5.4.302-223.469.amzn2.aarch64
kernel-devel-5.4.302-223.469.amzn2.aarch64
kernel-debuginfo-5.4.302-223.469.amzn2.aarch64
i686:
kernel-headers-5.4.302-223.469.amzn2.i686
src:
kernel-5.4.302-223.469.amzn2.src
x86_64:
kernel-5.4.302-223.469.amzn2.x86_64
kernel-headers-5.4.302-223.469.amzn2.x86_64
kernel-debuginfo-common-x86_64-5.4.302-223.469.amzn2.x86_64
perf-5.4.302-223.469.amzn2.x86_64
perf-debuginfo-5.4.302-223.469.amzn2.x86_64
python-perf-5.4.302-223.469.amzn2.x86_64
python-perf-debuginfo-5.4.302-223.469.amzn2.x86_64
kernel-tools-5.4.302-223.469.amzn2.x86_64
kernel-tools-devel-5.4.302-223.469.amzn2.x86_64
kernel-tools-debuginfo-5.4.302-223.469.amzn2.x86_64
bpftool-5.4.302-223.469.amzn2.x86_64
bpftool-debuginfo-5.4.302-223.469.amzn2.x86_64
kernel-devel-5.4.302-223.469.amzn2.x86_64
kernel-debuginfo-5.4.302-223.469.amzn2.x86_64