ALAS2KERNEL-5.15-2025-094

Amazon Linux 2 Security Advisory: ALAS2KERNEL-5.15-2025-094
Advisory Released Date: 2025-12-08
Advisory Updated Date: 2025-12-08
Severity: Important
Issue Overview:

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

vfs: Don't leak disconnected dentries on umount (CVE-2025-40105)

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

ext4: detect invalid INLINE_DATA + EXTENTS flag combination (CVE-2025-40167)

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

net/ip6_tunnel: Prevent perpetual tunnel growth (CVE-2025-40173)


Affected Packages:

kernel


Note:

This advisory is applicable to Amazon Linux 2 - Kernel-5.15 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-5.15-2025-094 to update your system.
System reboot is required in order to complete this update.

New Packages:
aarch64:
    kernel-5.15.196-137.219.amzn2.aarch64
    kernel-headers-5.15.196-137.219.amzn2.aarch64
    kernel-debuginfo-common-aarch64-5.15.196-137.219.amzn2.aarch64
    perf-5.15.196-137.219.amzn2.aarch64
    perf-debuginfo-5.15.196-137.219.amzn2.aarch64
    python-perf-5.15.196-137.219.amzn2.aarch64
    python-perf-debuginfo-5.15.196-137.219.amzn2.aarch64
    kernel-tools-5.15.196-137.219.amzn2.aarch64
    kernel-tools-devel-5.15.196-137.219.amzn2.aarch64
    kernel-tools-debuginfo-5.15.196-137.219.amzn2.aarch64
    bpftool-5.15.196-137.219.amzn2.aarch64
    bpftool-debuginfo-5.15.196-137.219.amzn2.aarch64
    kernel-devel-5.15.196-137.219.amzn2.aarch64
    kernel-debuginfo-5.15.196-137.219.amzn2.aarch64
    kernel-livepatch-5.15.196-137.219-1.0-0.amzn2.aarch64

i686:
    kernel-headers-5.15.196-137.219.amzn2.i686

src:
    kernel-5.15.196-137.219.amzn2.src

x86_64:
    kernel-5.15.196-137.219.amzn2.x86_64
    kernel-headers-5.15.196-137.219.amzn2.x86_64
    kernel-debuginfo-common-x86_64-5.15.196-137.219.amzn2.x86_64
    perf-5.15.196-137.219.amzn2.x86_64
    perf-debuginfo-5.15.196-137.219.amzn2.x86_64
    python-perf-5.15.196-137.219.amzn2.x86_64
    python-perf-debuginfo-5.15.196-137.219.amzn2.x86_64
    kernel-tools-5.15.196-137.219.amzn2.x86_64
    kernel-tools-devel-5.15.196-137.219.amzn2.x86_64
    kernel-tools-debuginfo-5.15.196-137.219.amzn2.x86_64
    bpftool-5.15.196-137.219.amzn2.x86_64
    bpftool-debuginfo-5.15.196-137.219.amzn2.x86_64
    kernel-devel-5.15.196-137.219.amzn2.x86_64
    kernel-debuginfo-5.15.196-137.219.amzn2.x86_64
    kernel-livepatch-5.15.196-137.219-1.0-0.amzn2.x86_64

Additional References

Release Notes:  Amazon Linux 2 Release Notes

Red Hat: CVE-2025-40105, CVE-2025-40167, CVE-2025-40173

Mitre: CVE-2025-40105, CVE-2025-40167, CVE-2025-40173