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[USN-8501-1] Linux kernel vulnerabilities

Posted on 02 July 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8501-1
July 02, 2026

linux vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel

Details:

It was discovered that a logic flaw existed in the XFRM ESP-in-TCP
subsystem in the Linux kernel when handling socket buffer fragments. This
flaw is known as Fragnesia. A local attacker could use this to escalate
privileges, or possibly escape a container. (CVE-2026-43503)

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:
- USB over IP driver;
- Network file system (NFS) server daemon;
- SMB network file system;
- Tracing infrastructure;
- Ethernet bridge;
- Ceph Core library;
- IPv4 networking;
- IPv6 networking;
- Netfilter;
- RxRPC session sockets;
- X.25 network layer;
(CVE-2024-35896, CVE-2026-23455, CVE-2026-31402, CVE-2026-31607,
CVE-2026-31637, CVE-2026-43011, CVE-2026-43037, CVE-2026-43038,
CVE-2026-43383, CVE-2026-43407, CVE-2026-45988, CVE-2026-46119,
CVE-2026-46243)

Update instructions:

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

Ubuntu 14.04 LTS
linux-image-3.13.0-214-generic 3.13.0-214.265
Available with Ubuntu Pro
linux-image-3.13.0-214-lowlatency 3.13.0-214.265
Available with Ubuntu Pro
linux-image-generic 3.13.0.214.224
Available with Ubuntu Pro
linux-image-generic-lts-trusty 3.13.0.214.224
Available with Ubuntu Pro
linux-image-lowlatency 3.13.0.214.224
Available with Ubuntu Pro
linux-image-server 3.13.0.214.224
Available with Ubuntu Pro
linux-image-virtual 3.13.0.214.224
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.

References:
https://ubuntu.com/security/notices/USN-8501-1
CVE-2024-35896, CVE-2026-23455, CVE-2026-31402, CVE-2026-31607,
CVE-2026-31637, CVE-2026-43011, CVE-2026-43037, CVE-2026-43038,
CVE-2026-43383, CVE-2026-43407, CVE-2026-43503, CVE-2026-45988,
CVE-2026-46119, CVE-2026-46243


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