========================================================================== Ubuntu Security Notice USN-8426-1 June 11, 2026
linux-azure-5.15, linux-azure-fips vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS
- linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems
Details:
It was discovered that the Linux kernel algif_aead module did not properly
handle in-place cryptographic operations. This flaw is known as Copy Fail.
A local attacker could use this to escalate privileges, or possibly escape
a container. (CVE-2026-31431)
It was discovered that the Linux kernel did not properly handle shared page
fragments during socket buffer operations, collectively known as Dirty
Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the
RxRPC networking subsystem when processing paged fragments. A local
attacker could use this to escalate privileges, or possibly escape a
container. (CVE-2026-43284, CVE-2026-43500)
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,
CVE-2026-46300)
Qualys discovered that a race condition existed in the ptrace subsystem of
the Linux kernel when privileged processes are exiting. An unprivileged
local attacker could use this issue to expose sensitive information.
(CVE-2026-46333)
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:
- Cryptographic API;
- Ethernet bonding driver;
- SMB network file system;
- Netfilter;
- io_uring subsystem;
- Packet sockets;
- RDS protocol;
- TLS protocol;
(CVE-2024-35862, CVE-2024-50060, CVE-2026-23274, CVE-2026-23351,
CVE-2026-31419, CVE-2026-31504, CVE-2026-31533, CVE-2026-43033,
CVE-2026-43077, CVE-2026-43078, CVE-2026-43494, CVE-2026-46028)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS
linux-image-5.15.0-1114-azure-fips 5.15.0-1114.123+fips1
Available with Ubuntu Pro
linux-image-azure-fips 5.15.0.1114.99
Available with Ubuntu Pro
linux-image-azure-fips-5.15 5.15.0.1114.99
Available with Ubuntu Pro
Ubuntu 20.04 LTS
linux-image-5.15.0-1114-azure 5.15.0-1114.123~20.04.1
Available with Ubuntu Pro
linux-image-azure 5.15.0.1114.123~20.04.1
Available with Ubuntu Pro
linux-image-azure-5.15 5.15.0.1114.123~20.04.1
Available with Ubuntu Pro
linux-image-azure-cvm 5.15.0.1114.123~20.04.1
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.
References:
https://ubuntu.com/security/notices/USN-8426-1
CVE-2024-35862, CVE-2024-50060, CVE-2026-23274, CVE-2026-23351,
CVE-2026-31419, CVE-2026-31431, CVE-2026-31504, CVE-2026-31533,
CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-43284,
CVE-2026-43494, CVE-2026-43500, CVE-2026-43503, CVE-2026-46028,
CVE-2026-46300, CVE-2026-46333
Package Information:
https://launchpad.net/ubuntu/+source/linux-azure-fips/5.15.0-1114.123+fips1
OpenPGP_signature.asc
Description: OpenPGP digital signature
