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Ubuntu Linux Kernel Critical Security Flaws Update USN-8493-1

ubuntu
Calendar Grey July 1, 2026
Dist Ubuntu Esm H88
Several security issues fixed in Ubuntu Linux kernel require immediate updates to maintain system integrity and security.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-fips: Linux kernel with FIPS

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-gcp-fips: Linux kernel for Google Cloud Platform (GCP) systems with FIPS

- linux-gke: Linux kernel for Google Container Engine (GKE) systems

- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems

- linux-ibm: Linux kernel for IBM cloud systems

- linux-intel-iot-realtime: Linux kernel for Intel IoT Real-time platforms

- linux-intel-iotg: Linux kernel for Intel IoT platforms

- linux-kvm: Linux kernel for cloud environments

- linux-lowlatency: Linux low latency kernel

- linux-nvidia: Linux kernel for NVIDIA systems

- linux-nvidia-tegra: Linux kernel for NVIDIA ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel network system

Update Instructions

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

Ubuntu 22.04 LTS
  linux-image-5.15.0-1052-nvidia-tegra-igx  5.15.0-1052.52
  linux-image-5.15.0-1052-nvidia-tegra-igx-rt  5.15.0-1052.52
  linux-image-5.15.0-1063-nvidia-tegra  5.15.0-1063.63
  linux-image-5.15.0-1063-nvidia-tegra-rt  5.15.0-1063.63
  linux-image-5.15.0-1094-gkeop   5.15.0-1094.102
  linux-image-5.15.0-1103-intel-iot-realtime  5.15.0-1103.105
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1103-kvm     5.15.0-1103.108
  linux-image-5.15.0-1105-ibm     5.15.0-1105.109
  linux-image-5.15.0-1106-intel-iotg  5.15.0-1106.112
  linux-image-5.15.0-1106-nvidia  5.15.0-1106.107
  linux-image-5.15.0-1106-nvidia-lowlatency  5.15.0-1106.107
  linux-image-5.15.0-1107-gke     5.15.0-1107.113
  linux-image-5.15.0-1108-oracle  5.15.0-1108.114
  linux-image-5.15.0-1110-realtime  5.15.0-1110.119
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1111-aws     5.15.0-1111.118
  linux-image-5.15.0-1111-aws-64k  5.15.0-1111.118
  linux-image-5.15.0-1111-aws-fips  5.15.0-1111.118+fips1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1111-gcp     5.15.0-1111.121
  linux-image-5.15.0-1111-gcp-fips  5.15.0-1111.121+fips1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1116-azure   5.15.0-1116.125
  linux-image-5.15.0-183-lowlatency  5.15.0-183.193
  linux-image-5.15.0-183-lowlatency-64k  5.15.0-183.193
  linux-image-5.15.0-185-fips     5.15.0-185.195+fips1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-185-generic  5.15.0-185.195
  linux-image-5.15.0-185-generic-64k  5.15.0-185.195
  linux-image-5.15.0-185-generic-lpae  5.15.0-185.195
  linux-image-aws-5.15            5.15.0.1111.114
  linux-image-aws-64k-5.15        5.15.0.1111.114
  linux-image-aws-64k-lts-22.04   5.15.0.1111.114
  linux-image-aws-fips            5.15.0.1111.107
                                  Available with Ubuntu Pro
  linux-image-aws-fips-5.15       5.15.0.1111.107
                                  Available with Ubuntu Pro
  linux-image-aws-lts-22.04       5.15.0.1111.114
  linux-image-azure-5.15          5.15.0.1116.114
  linux-image-azure-lts-22.04     5.15.0.1116.114
  linux-image-fips                5.15.0.185.108
                                  Available with Ubuntu Pro
  linux-image-fips-5.15           5.15.0.185.108
                                  Available with Ubuntu Pro
  linux-image-gcp-5.15            5.15.0.1111.108
  linux-image-gcp-fips            5.15.0.1111.101
                                  Available with Ubuntu Pro
  linux-image-gcp-fips-5.15       5.15.0.1111.101
                                  Available with Ubuntu Pro
  linux-image-gcp-lts-22.04       5.15.0.1111.108
  linux-image-generic             5.15.0.185.166
  linux-image-generic-5.15        5.15.0.185.166
  linux-image-generic-64k         5.15.0.185.166
  linux-image-generic-64k-5.15    5.15.0.185.166
  linux-image-generic-lpae        5.15.0.185.166
  linux-image-generic-lpae-5.15   5.15.0.185.166
  linux-image-gke                 5.15.0.1107.106
  linux-image-gke-5.15            5.15.0.1107.106
  linux-image-gkeop               5.15.0.1094.93
  linux-image-gkeop-5.15          5.15.0.1094.93
  linux-image-ibm                 5.15.0.1105.102
  linux-image-ibm-5.15            5.15.0.1105.102
  linux-image-intel-iot-realtime  5.15.0.1103.107
                                  Available with Ubuntu Pro
  linux-image-intel-iot-realtime-5.15  5.15.0.1103.107
                                  Available with Ubuntu Pro
  linux-image-intel-iotg          5.15.0.1106.105
  linux-image-intel-iotg-5.15     5.15.0.1106.105
  linux-image-kvm                 5.15.0.1103.99
  linux-image-kvm-5.15            5.15.0.1103.99
  linux-image-lowlatency          5.15.0.183.154
  linux-image-lowlatency-5.15     5.15.0.183.154
  linux-image-lowlatency-64k      5.15.0.183.154
  linux-image-lowlatency-64k-5.15  5.15.0.183.154
  linux-image-nvidia              5.15.0.1106.106
  linux-image-nvidia-5.15         5.15.0.1106.106
  linux-image-nvidia-lowlatency   5.15.0.1106.106
  linux-image-nvidia-lowlatency-5.15  5.15.0.1106.106
  linux-image-nvidia-tegra        5.15.0.1063.63
  linux-image-nvidia-tegra-5.15   5.15.0.1063.63
  linux-image-nvidia-tegra-igx    5.15.0.1052.54
  linux-image-nvidia-tegra-igx-5.15  5.15.0.1052.54
  linux-image-nvidia-tegra-igx-rt  5.15.0.1052.54
  linux-image-nvidia-tegra-igx-rt-5.15  5.15.0.1052.54
  linux-image-nvidia-tegra-rt     5.15.0.1063.63
  linux-image-nvidia-tegra-rt-5.15  5.15.0.1063.63
  linux-image-oem-20.04           5.15.0.185.166
  linux-image-oracle-5.15         5.15.0.1108.104
  linux-image-oracle-lts-22.04    5.15.0.1108.104
  linux-image-realtime            5.15.0.1110.114
                                  Available with Ubuntu Pro
  linux-image-realtime-5.15       5.15.0.1110.114
                                  Available with Ubuntu Pro
  linux-image-virtual             5.15.0.185.166
  linux-image-virtual-5.15        5.15.0.185.166

Ubuntu 20.04 LTS
  linux-image-5.15.0-1063-nvidia-tegra  5.15.0-1063.63~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1063-nvidia-tegra-rt  5.15.0-1063.63~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1105-ibm     5.15.0-1105.109~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1111-aws     5.15.0-1111.118~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1116-azure   5.15.0-1116.125~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1116-azure-fde  5.15.0-1116.125~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-183-lowlatency  5.15.0-183.193~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-183-lowlatency-64k  5.15.0-183.193~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-185-generic  5.15.0-185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-185-generic-64k  5.15.0-185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-185-generic-lpae  5.15.0-185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-aws                 5.15.0.1111.118~20.04.1
                                  Available with Ubuntu Pro
  linux-image-aws-5.15            5.15.0.1111.118~20.04.1
                                  Available with Ubuntu Pro
  linux-image-azure               5.15.0.1116.125~20.04.1
                                  Available with Ubuntu Pro
  linux-image-azure-5.15          5.15.0.1116.125~20.04.1
                                  Available with Ubuntu Pro
  linux-image-azure-cvm           5.15.0.1116.125~20.04.1
                                  Available with Ubuntu Pro
  linux-image-azure-fde           5.15.0.1116.125~20.04.1
                                  Available with Ubuntu Pro
  linux-image-azure-fde-5.15      5.15.0.1116.125~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-5.15        5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-64k-5.15    5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-64k-hwe-20.04  5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-hwe-20.04   5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-lpae-5.15   5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-lpae-hwe-20.04  5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-ibm                 5.15.0.1105.109~20.04.1
                                  Available with Ubuntu Pro
  linux-image-ibm-5.15            5.15.0.1105.109~20.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-5.15     5.15.0.183.193~20.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-64k-5.15  5.15.0.183.193~20.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-64k-hwe-20.04  5.15.0.183.193~20.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-hwe-20.04  5.15.0.183.193~20.04.1
                                  Available with Ubuntu Pro
  linux-image-nvidia-tegra        5.15.0.1063.63~20.04.1
                                  Available with Ubuntu Pro
  linux-image-nvidia-tegra-5.15   5.15.0.1063.63~20.04.1
                                  Available with Ubuntu Pro
  linux-image-nvidia-tegra-rt     5.15.0.1063.63~20.04.1
                                  Available with Ubuntu Pro
  linux-image-nvidia-tegra-rt-5.15  5.15.0.1063.63~20.04.1
                                  Available with Ubuntu Pro
  linux-image-oem-20.04           5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-oem-20.04b          5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-oem-20.04c          5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-oem-20.04d          5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-virtual-5.15        5.15.0.185.195~20.04.1
                                  Available with Ubuntu Pro
  linux-image-virtual-hwe-20.04   5.15.0.185.195~20.04.1
                                  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-8493-1

CVE-2022-48816, CVE-2023-53673, CVE-2025-37778, CVE-2025-37822,

CVE-2025-37924, CVE-2025-38201, CVE-2025-40082, CVE-2025-68214,

CVE-2025-68263, CVE-2025-71089, CVE-2025-71220, CVE-2025-71222,

CVE-2025-71224, CVE-2026-23176, CVE-2026-23180, CVE-2026-23182,

CVE-2026-23190, CVE-2026-23193, CVE-2026-23198, CVE-2026-23202,

CVE-2026-23206, CVE-2026-23216, CVE-2026-23256, CVE-2026-23257,

CVE-2026-23258, CVE-2026-23262, CVE-2026-23272, CVE-2026-23278,

CVE-2026-23428, CVE-2026-23450, CVE-2026-23455, CVE-2026-31402,

CVE-2026-31418, CVE-2026-31478, CVE-2026-31607, CVE-2026-31637,

CVE-2026-31649, CVE-2026-31657, CVE-2026-31659, CVE-2026-31668,

CVE-2026-31669, CVE-2026-31682, CVE-2026-31685, CVE-2026-43011,

CVE-2026-43037, CVE-2026-43038, CVE-2026-43071, CVE-2026-43114,

CVE-2026-43117, CVE-2026-43186, CVE-2026-43304, CVE-2026-43341,

CVE-2026-43383, CVE-2026-43406, CVE-2026-43407, CVE-2026-43414,

CVE-2026-43493, CVE-2026-43501, CVE-2026-45988, CVE-2026-46043,

CVE-2026-46119, CVE-2026-46135, CVE-2026-46195, CVE-2026-46243

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8493-1

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel network system

Package Information

https://launchpad.net/ubuntu/+source/linux/5.15.0-185.195
https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1111.118
https://launchpad.net/ubuntu/+source/linux-aws-fips/5.15.0-1111.118+fips1
https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1116.125
https://launchpad.net/ubuntu/+source/linux-fips/5.15.0-185.195+fips1
https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1111.121
https://launchpad.net/ubuntu/+source/linux-gcp-fips/5.15.0-1111.121+fips1
https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1107.113
https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1094.102
https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1105.109
https://launchpad.net/ubuntu/+source/linux-intel-iot-realtime/5.15.0-1103.105
https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1106.112
https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1103.108
https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-183.193
https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1106.107
https://launchpad.net/ubuntu/+source/linux-nvidia-tegra/5.15.0-1063.63
https://launchpad.net/ubuntu/+source/linux-nvidia-tegra-igx/5.15.0-1052.52
https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1108.114
https://launchpad.net/ubuntu/+source/linux-realtime/5.15.0-1110.119

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