Ubuntu USN · USN-8391-1

Linux kernel (Raspberry Pi) vulnerabilities

Published: Thu, 04 Jun 2026 21:23

CVE-2026-31504CVE-2026-31533CVE-2026-43284CVE-2026-43078CVE-2026-46028CVE-2026-31431CVE-2026-23209CVE-2026-43077CVE-2026-43500CVE-2024-50304CVE-2026-43494CVE-2026-43033CVE-2026-23112

Summary

Several security issues were fixed in the Linux kernel.

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) 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; - Network drivers; - NVME drivers; - IPv4 networking; - Packet sockets; - RDS protocol; - TLS protocol; (CVE-2024-50304, CVE-2026-23112, CVE-2026-23209, CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-43494, CVE-2026-46028)

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu bionic

linux-raspi-5.4→5.4.0-1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0-1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-5.4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-buildinfo-5.4.0-1143-raspi→5.4.0-1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0-1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-buildinfo-5.4.0-1143-raspi
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-headers-5.4.0-1143-raspi→5.4.0-1143.156~18.04.1kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-5.4.0-1143-raspi
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-headers-raspi-5.4→5.4.0.1143.156~18.04.1kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-raspi-5.4
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-headers-raspi-hwe-18.04→5.4.0.1143.156~18.04.1kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-raspi-hwe-18.04
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-headers-raspi-hwe-18.04-edge→5.4.0.1143.156~18.04.1kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-raspi-hwe-18.04-edge
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-5.4.0-1143-raspi→5.4.0-1143.156~18.04.1kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-5.4.0-1143-raspi
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-raspi-5.4→5.4.0.1143.156~18.04.1kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-raspi-5.4
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-raspi-hwe-18.04→5.4.0.1143.156~18.04.1kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-raspi-hwe-18.04
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-raspi-hwe-18.04-edge→5.4.0.1143.156~18.04.1kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-raspi-hwe-18.04-edge
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-modules-5.4.0-1143-raspi→5.4.0-1143.156~18.04.1kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-modules-5.4.0-1143-raspi
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-raspi-5.4→5.4.0.1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-5.4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi-5.4-headers-5.4.0-1143→5.4.0-1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0-1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-5.4-headers-5.4.0-1143
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi-5.4-tools-5.4.0-1143→5.4.0-1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0-1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-5.4-tools-5.4.0-1143
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi-hwe-18.04→5.4.0.1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-hwe-18.04
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi-hwe-18.04-edge→5.4.0.1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-hwe-18.04-edge
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-5.4.0-1143-raspi→5.4.0-1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0-1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-5.4.0-1143-raspi
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-raspi-5.4→5.4.0.1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-raspi-5.4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-raspi-hwe-18.04→5.4.0.1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-raspi-hwe-18.04
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-raspi-hwe-18.04-edge→5.4.0.1143.156~18.04.1apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.156~18.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-raspi-hwe-18.04-edge
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu focal

linux-raspi→5.4.0-1143.156apt_upgrade
Standard apt upgrade. Install 5.4.0-1143.156 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-buildinfo-5.4.0-1143-raspi→5.4.0-1143.156apt_upgrade
Standard apt upgrade. Install 5.4.0-1143.156 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-buildinfo-5.4.0-1143-raspi
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-headers-5.4.0-1143-raspi→5.4.0-1143.156kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-5.4.0-1143-raspi
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-headers-raspi→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-raspi
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-headers-raspi-5.4→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-raspi-5.4
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-headers-raspi-hwe-18.04→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-raspi-hwe-18.04
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-headers-raspi-hwe-18.04-edge→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-raspi-hwe-18.04-edge
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-headers-raspi2→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-raspi2
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-headers-raspi2-hwe-18.04→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-raspi2-hwe-18.04
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-headers-raspi2-hwe-18.04-edge→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-headers-raspi2-hwe-18.04-edge
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-5.4.0-1143-raspi→5.4.0-1143.156kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-5.4.0-1143-raspi
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-raspi→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-raspi
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-raspi-5.4→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-raspi-5.4
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-raspi-hwe-18.04→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-raspi-hwe-18.04
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-raspi-hwe-18.04-edge→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-raspi-hwe-18.04-edge
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-raspi2→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-raspi2
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-raspi2-hwe-18.04→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-raspi2-hwe-18.04
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-image-raspi2-hwe-18.04-edge→5.4.0.1143.174kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-image-raspi2-hwe-18.04-edge
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-modules-5.4.0-1143-raspi→5.4.0-1143.156kernel_reboot
Kernel package — apt-upgrade then REBOOT to load the patched kernel.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-modules-5.4.0-1143-raspi
sudo reboot
```
Reboot is required. ~30-60s downtime; containers self-restart.
linux-raspi→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi-5.4→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-5.4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi-headers-5.4.0-1143→5.4.0-1143.156apt_upgrade
Standard apt upgrade. Install 5.4.0-1143.156 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-headers-5.4.0-1143
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi-hwe-18.04→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-hwe-18.04
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi-hwe-18.04-edge→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-hwe-18.04-edge
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi-tools-5.4.0-1143→5.4.0-1143.156apt_upgrade
Standard apt upgrade. Install 5.4.0-1143.156 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi-tools-5.4.0-1143
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi2→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi2-hwe-18.04→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi2-hwe-18.04
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-raspi2-hwe-18.04-edge→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-raspi2-hwe-18.04-edge
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-5.4.0-1143-raspi→5.4.0-1143.156apt_upgrade
Standard apt upgrade. Install 5.4.0-1143.156 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-5.4.0-1143-raspi
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-raspi→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-raspi
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-raspi-5.4→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-raspi-5.4
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-raspi-hwe-18.04→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-raspi-hwe-18.04
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-raspi-hwe-18.04-edge→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-raspi-hwe-18.04-edge
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-raspi2→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-raspi2
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-raspi2-hwe-18.04→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-raspi2-hwe-18.04
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
linux-tools-raspi2-hwe-18.04-edge→5.4.0.1143.174apt_upgrade
Standard apt upgrade. Install 5.4.0.1143.174 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y linux-tools-raspi2-hwe-18.04-edge
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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