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Ubuntu Kernel Update USN-8725

Ubuntu Kernel Update USN-8725

Linuxsecurity •LinuxSecurity Advisories • September 4, 2026

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Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-fips: Linux kernel with FIPS - linux-kvm: Linux kernel for cloud environments - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - NVIDIA Tegra memory controller driver; - File systems infrastructure; - Network file system (NFS) server daemon; - OCFS2 file system; - B.A.T.M.A.N. meshing protocol; - Netfilter; - SCTP protocol; (CVE-2022-50401, CVE-2026-43071, CVE-2026-52914, CVE-2026-53002, CVE-2026-53043, CVE-2026-53045, CVE-2026-53224, CVE-2026-53309)

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-fips: Linux kernel with FIPS

- linux-kvm: Linux kernel for cloud environments

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Several security issues were discovered in the Linux kernel.

An attacker could possibly use these to compromise the system.

This update corrects flaws in the following subsystems:

- NVIDIA Tegra memory controller driver;

- File systems infrastructure;

- Network file system (NFS) server daemon;

- B.A.T.M.A.N. meshing protocol;

(CVE-2022-50401, CVE-2026-43071, CVE-2026-52914, CVE-2026-53002,

CVE-2026-53043, CVE-2026-53045, CVE-2026-53224, CVE-2026-53309)

The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS linux-image-4.4.0-1128-fips 4.4.0-1128.135 Available with Ubuntu Pro linux-image-4.4.0-1159-kvm 4.4.0-1159.170 Available with Ubuntu Pro linux-image-4.4.0-287-generic 4.4.0-287.321 Available with Ubuntu Pro linux-image-4.4.0-287-lowlatency 4.4.0-287.321 Available with Ubuntu Pro linux-image-fips 4.4.0.1128.130 Available with Ubuntu Pro linux-image-generic 4.4.0.287.293 Available with Ubuntu Pro linux-image-generic-lts-xenial 4.4.0.287.293 Available with Ubuntu Pro linux-image-kvm 4.4.0.1159.156 Available with Ubuntu Pro linux-image-lowlatency 4.4.0.287.293 Available with Ubuntu Pro linux-image-lowlatency-lts-xenial 4.4.0.287.293 Available with Ubuntu Pro linux-image-virtual 4.4.0.287.293 Available with Ubuntu Pro linux-image-virtual-lts-xenial 4.4.0.287.293 Available with Ubuntu Pro Ubuntu 14.04 LTS linux-image-4.4.0-1158-aws 4.4.0-1158.164 Available with Ubuntu Pro linux-image-4.4.0-287-generic 4.4.0-287.321~14.04.1 Available with Ubuntu Pro linux-image-4.4.0-287-lowlatency 4.4.0-287.321~14.04.1 Available with Ubuntu Pro linux-image-aws 4.4.0.1158.155 Available with Ubuntu Pro linux-image-generic-lts-xenial 4.4.0.287.321~14.04.1 Available with Ubuntu Pro linux-image-lowlatency-lts-xenial 4.4.0.287.321~14.04.1 Available with Ubuntu Pro linux-image-virtual-lts-xenial 4.4.0.287.321~14.04.1 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.

CVE-2022-50401, CVE-2026-43071, CVE-2026-52914, CVE-2026-53002,

CVE-2026-53043, CVE-2026-53045, CVE-2026-53224, CVE-2026-53309

Ubuntu Security Notice USN-8725-1

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