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USN-8630-2: Linux kernel vulnerabilities

USN-8630-2: Linux kernel vulnerabilities

Ubuntu • August 13, 2026

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: x86 architecture; InfiniBand drivers; Network drivers; Mellanox network drivers; File systems infrastructure; IPv4 networking; Network traffic control; TCP network protocol; B.A.T.M.A.N. meshing protocol; IPv6 networking; Multipath TCP; Netfilter; RxRPC session sockets; SCTP protocol; SMC sockets

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:

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: x86 architecture; InfiniBand drivers; Network drivers; Mellanox network drivers; File systems infrastructure; IPv4 networking; Network traffic control; TCP network protocol; B.A.T.M.A.N. meshing protocol; IPv6 networking; Multipath TCP; Netfilter; RxRPC session sockets; SCTP protocol; SMC sockets

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:

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:

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.

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