Skip to content
USN-8818-4: Linux kernel vulnerabilities

USN-8818-4: Linux kernel vulnerabilities

Ubuntu • September 30, 2026

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 A local attacker could possibly use this to write to memory after permission to do so had been revoked, bypassing memory protections or escalating privileges.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...

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 A local attacker could possibly use this to write to memory after permission to do so had been revoked, bypassing memory protections or escalating privileges.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:

Network file system (NFS) client;

Network file system (NFS) server daemon;

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

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 A local attacker could possibly use this to write to memory after permission to do so had been revoked, bypassing memory protections or escalating privileges.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

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:

Network file system (NFS) client;

Network file system (NFS) server daemon;

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

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.

The problem can be corrected by updating your system to the following package versions:

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Have additional questions?

Talk to a member of the team ›

Extracted Entities