Home / mailings [USN-8818-4] Linux kernel vulnerabilities
Posted on 30 September 2026
Ubuntu Security==========================================================================Ubuntu Security Notice USN-8818-4
September 30, 2026
linux, linux-nvidia vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
- linux-nvidia: Linux kernel for NVIDIA systems
Details:
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
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:
- ARM64 architecture;
- InfiniBand drivers;
- Network drivers;
- TCM subsystem;
- exFAT file system;
- Network file system (NFS) client;
- Network file system (NFS) server daemon;
- B.A.T.M.A.N. meshing protocol;
- IPv4 networking;
- IPv6 networking;
- Netfilter;
- RDS protocol;
(CVE-2026-53186, CVE-2026-53216, CVE-2026-53221, CVE-2026-53354,
CVE-2026-53355, CVE-2026-53398, CVE-2026-63800, CVE-2026-63808,
CVE-2026-63887, CVE-2026-63888, CVE-2026-63912, CVE-2026-63922,
CVE-2026-63924, CVE-2026-63984, CVE-2026-63992, CVE-2026-63993,
CVE-2026-63994, CVE-2026-64007, CVE-2026-64091)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS
linux-image-5.15.0-1111-nvidia 5.15.0-1111.112
linux-image-5.15.0-1111-nvidia-lowlatency 5.15.0-1111.112
linux-image-5.15.0-194-generic 5.15.0-194.204
linux-image-5.15.0-194-generic-64k 5.15.0-194.204
linux-image-5.15.0-194-generic-lpae 5.15.0-194.204
linux-image-generic 5.15.0.194.171
linux-image-generic-5.15 5.15.0.194.171
linux-image-generic-64k 5.15.0.194.171
linux-image-generic-64k-5.15 5.15.0.194.171
linux-image-generic-lpae 5.15.0.194.171
linux-image-generic-lpae-5.15 5.15.0.194.171
linux-image-nvidia 5.15.0.1111.111
linux-image-nvidia-5.15 5.15.0.1111.111
linux-image-nvidia-lowlatency 5.15.0.1111.111
linux-image-nvidia-lowlatency-5.15 5.15.0.1111.111
linux-image-virtual 5.15.0.194.171
linux-image-virtual-5.15 5.15.0.194.171
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.
References:
https://ubuntu.com/security/notices/USN-8818-4
https://ubuntu.com/security/notices/USN-8818-3
https://ubuntu.com/security/notices/USN-8818-2
https://ubuntu.com/security/notices/USN-8818-1
CVE-2025-10263, CVE-2026-53186, CVE-2026-53216, CVE-2026-53221,
CVE-2026-53354, CVE-2026-53355, CVE-2026-53398, CVE-2026-63800,
CVE-2026-63808, CVE-2026-63887, CVE-2026-63888, CVE-2026-63912,
CVE-2026-63922, CVE-2026-63924, CVE-2026-63984, CVE-2026-63992,
CVE-2026-63993, CVE-2026-63994, CVE-2026-64007, CVE-2026-64091
Package Information:
https://launchpad.net/ubuntu/+source/linux/5.15.0-194.204
https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1111.112
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