ALAS2KERNEL-5.10-2026-128

Amazon Linux 2 Security Advisory: ALAS2KERNEL-5.10-2026-128
Advisory Released Date: 2026-08-04
Advisory Updated Date: 2026-08-04
Severity: Important
Issue Overview:

In the Linux kernel, the following vulnerability has been resolved:

ipv6: use RCU in ip6_output() (CVE-2025-40158)

In the Linux kernel, the following vulnerability has been resolved:

xfrm: Wait for RCU readers during policy netns exit (CVE-2026-43091)

In the Linux kernel, the following vulnerability has been resolved:

sched/psi: fix race between file release and pressure write (CVE-2026-52991)

In the Linux kernel, the following vulnerability has been resolved:

sctp: validate embedded INIT chunk and address list lengths in cookie (CVE-2026-53224)


Affected Packages:

kernel


Note:

This advisory is applicable to Amazon Linux 2 - Kernel-5.10 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-5.10-2026-128 to update your system.
System reboot is required in order to complete this update.

New Packages:
aarch64:
    kernel-5.10.260-259.1061.amzn2.aarch64
    kernel-headers-5.10.260-259.1061.amzn2.aarch64
    kernel-debuginfo-common-aarch64-5.10.260-259.1061.amzn2.aarch64
    perf-5.10.260-259.1061.amzn2.aarch64
    perf-debuginfo-5.10.260-259.1061.amzn2.aarch64
    python-perf-5.10.260-259.1061.amzn2.aarch64
    python-perf-debuginfo-5.10.260-259.1061.amzn2.aarch64
    kernel-tools-5.10.260-259.1061.amzn2.aarch64
    kernel-tools-devel-5.10.260-259.1061.amzn2.aarch64
    kernel-tools-debuginfo-5.10.260-259.1061.amzn2.aarch64
    bpftool-5.10.260-259.1061.amzn2.aarch64
    bpftool-debuginfo-5.10.260-259.1061.amzn2.aarch64
    kernel-devel-5.10.260-259.1061.amzn2.aarch64
    kernel-debuginfo-5.10.260-259.1061.amzn2.aarch64
    kernel-livepatch-5.10.260-259.1061-1.0-0.amzn2.aarch64

i686:
    kernel-headers-5.10.260-259.1061.amzn2.i686

src:
    kernel-5.10.260-259.1061.amzn2.src

x86_64:
    kernel-5.10.260-259.1061.amzn2.x86_64
    kernel-headers-5.10.260-259.1061.amzn2.x86_64
    kernel-debuginfo-common-x86_64-5.10.260-259.1061.amzn2.x86_64
    perf-5.10.260-259.1061.amzn2.x86_64
    perf-debuginfo-5.10.260-259.1061.amzn2.x86_64
    python-perf-5.10.260-259.1061.amzn2.x86_64
    python-perf-debuginfo-5.10.260-259.1061.amzn2.x86_64
    kernel-tools-5.10.260-259.1061.amzn2.x86_64
    kernel-tools-devel-5.10.260-259.1061.amzn2.x86_64
    kernel-tools-debuginfo-5.10.260-259.1061.amzn2.x86_64
    bpftool-5.10.260-259.1061.amzn2.x86_64
    bpftool-debuginfo-5.10.260-259.1061.amzn2.x86_64
    kernel-devel-5.10.260-259.1061.amzn2.x86_64
    kernel-debuginfo-5.10.260-259.1061.amzn2.x86_64
    kernel-livepatch-5.10.260-259.1061-1.0-0.amzn2.x86_64

Additional References

Release Notes:  Amazon Linux 2 Release Notes

Red Hat: CVE-2025-40158, CVE-2026-43091, CVE-2026-52991, CVE-2026-53224

Mitre: CVE-2025-40158, CVE-2026-43091, CVE-2026-52991, CVE-2026-53224