Ubuntu alert USN-8373-1 (linux, linux-aws, linux-aws-6.8, linux-aws-fips, linux-azure, linux-fips, linux-gcp, linux-gcp-6.8, linux-gcp-fips, linux-gke, linux-gkeop, linux-hwe-6.8, linux-ibm, linux-ibm-6.8, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency, linux-nvidia-tegra, linux-oracle, linux-oracle-6.8, linux-raspi, linux-raspi-realtime, linux-realtime, linux-realtime-6.8)
| From: | Rodrigo Figueiredo Zaiden via ubuntu-security-announce <ubuntu-security-announce@lists.ubuntu.com> | |
| To: | ubuntu-security-announce@lists.ubuntu.com | |
| Subject: | [USN-8373-1] Linux kernel vulnerabilities | |
| Date: | Tue, 02 Jun 2026 14:20:25 -0300 | |
| Message-ID: | <fc8a74f3-5a16-4995-a5f8-7b1025ee2f51@canonical.com> | |
| Cc: | Rodrigo Figueiredo Zaiden <rodrigo.zaiden@canonical.com> |
========================================================================== Ubuntu Security Notice USN-8373-1 June 02, 2026 linux, linux-aws, linux-aws-6.8, linux-aws-fips, linux-azure, linux-fips, linux-gcp, linux-gcp-6.8, linux-gcp-fips, linux-gke, linux-gkeop, linux-hwe-6.8, linux-ibm, linux-ibm-6.8, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency, linux-nvidia-tegra, linux-oracle, linux-oracle-6.8, linux-raspi, linux-raspi-realtime, linux-realtime, linux-realtime-6.8 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS 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-nvidia: Linux kernel for NVIDIA systems - linux-nvidia-lowlatency: Linux low latency kernel for NVIDIA systems - linux-nvidia-tegra: Linux kernel for NVIDIA Tegra systems - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi: Linux kernel for Raspberry Pi systems - linux-raspi-realtime: Linux kernel for Raspberry Pi Real-time systems - linux-realtime: Linux kernel for Real-time systems - linux-aws-6.8: Linux kernel for Amazon Web Services (AWS) systems - linux-gcp-6.8: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe-6.8: Linux hardware enablement (HWE) kernel - linux-ibm-6.8: Linux kernel for IBM cloud systems - linux-nvidia-6.8: Linux kernel for NVIDIA systems - linux-oracle-6.8: Linux kernel for Oracle Cloud systems - linux-realtime-6.8: Linux kernel for Real-time systems Details: 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, CVE-2026-45998, CVE-2026-46000) 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) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contain a memory leak when handling AppArmor notifications. A local attacker could use this to cause resource exhaustion. (CVE-2026-47326) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contain a NULL pointer dereference when handling AppArmor notifications. A local attacker could use this to cause a kernel oops. (CVE-2026-47327) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained an invalid free when handling AppArmor notifications. A local attacker could use this to corrupt kernel memory. (CVE-2026-47328) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained insufficient validation of AppArmor notification responses. A local attacker could use this to allow crafted responses to be processed. (CVE-2026-47329) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 used an uninitialized variable when handling AppArmor notifications. A local attacker could use this to cause incorrect caching of data. (CVE-2026-47330) Tristan Madani discovered that Ubuntu Linux kernel 6.8 contained a use- after-free (UAF) bug. A local attacker could use this to cause memory corruption and, theoretically, arbitrary code execution. (CVE-2026-47331) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained an out-of-bounds (OOB) read when handling AppArmor notifications. A local attacker could use this to cause information disclosure of kernel memory. (CVE-2026-47332) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a out-of-bounds (OOB) read when handling AppArmor notifications. A local attacker could use this to cause kernel memory corruption and, theoretically, influence processing of AppArmor policies. (CVE-2026-47333) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained incorrect holding of locks when handling AppArmor notifications. A local attacker could use this to cause a kernel panic or deadlock. (CVE-2026-47334) Tristan Madani discovered that Ubuntu Linux kernel 6.8 contained a NULL pointer dereference when handling AppArmor notifications. A local attacker could use this to cause a kernel panic. (CVE-2026-47335) Tristan Madani discovered that Ubuntu Linux kernel 6.8 used an uninitialized variable when handling AppArmor AF_INET/AF_INET6 socket mediation. A local attacker could use this to influence processing of fine- grained network socket mediation. (CVE-2026-47336) Tristan Madani and Trevor Lawrence have each independently discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a NULL pointer dereference when handling AppArmor network socket mediation. A local attacker could use this to cause a kernel oops. (CVE-2026-47337) 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: - RDS protocol; - RxRPC session sockets; (CVE-2026-31676, CVE-2026-43494) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS linux-image-6.8.0-1026-nvidia-tegra 6.8.0-1026.26 linux-image-6.8.0-1026-nvidia-tegra-rt 6.8.0-1026.26 linux-image-6.8.0-1042-gkeop 6.8.0-1042.45 linux-image-6.8.0-1054-oracle 6.8.0-1054.55 linux-image-6.8.0-1054-oracle-64k 6.8.0-1054.55 linux-image-6.8.0-1055-gke 6.8.0-1055.61 linux-image-6.8.0-1055-gke-64k 6.8.0-1055.61 linux-image-6.8.0-1055-nvidia 6.8.0-1055.58 linux-image-6.8.0-1055-nvidia-64k 6.8.0-1055.58 linux-image-6.8.0-1055-nvidia-lowlatency 6.8.0-1055.58.1 linux-image-6.8.0-1055-nvidia-lowlatency-64k 6.8.0-1055.58.1 linux-image-6.8.0-1057-aws 6.8.0-1057.60 linux-image-6.8.0-1057-aws-64k 6.8.0-1057.60 linux-image-6.8.0-1057-aws-fips 6.8.0-1057.60+fips1 Available with Ubuntu Pro linux-image-6.8.0-1057-ibm 6.8.0-1057.58 linux-image-6.8.0-1057-raspi 6.8.0-1057.61 linux-image-6.8.0-1058-azure 6.8.0-1058.64 linux-image-6.8.0-1060-gcp 6.8.0-1060.63 linux-image-6.8.0-1060-gcp-64k 6.8.0-1060.63 linux-image-6.8.0-1060-gcp-fips 6.8.0-1060.63+fips1 Available with Ubuntu Pro linux-image-6.8.0-124-fips 6.8.0-124.124+fips1 Available with Ubuntu Pro linux-image-6.8.0-124-generic 6.8.0-124.124 linux-image-6.8.0-124-generic-64k 6.8.0-124.124 linux-image-6.8.0-2046-raspi-realtime 6.8.0-2046.47 Available with Ubuntu Pro linux-image-6.8.1-1052-realtime 6.8.1-1052.53 Available with Ubuntu Pro linux-image-aws-6.8 6.8.0-1057.60 linux-image-aws-64k-6.8 6.8.0-1057.60 linux-image-aws-64k-lts-24.04 6.8.0-1057.60 linux-image-aws-fips 6.8.0-1057.60+fips1 Available with Ubuntu Pro linux-image-aws-fips-6.8 6.8.0-1057.60+fips1 Available with Ubuntu Pro linux-image-aws-lts-24.04 6.8.0-1057.60 linux-image-azure-6.8 6.8.0-1058.64 linux-image-azure-lts-24.04 6.8.0-1058.64 linux-image-fips 6.8.0-124.124+fips1 Available with Ubuntu Pro linux-image-fips-6.8 6.8.0-124.124+fips1 Available with Ubuntu Pro linux-image-gcp-6.8 6.8.0-1060.63 linux-image-gcp-64k-6.8 6.8.0-1060.63 linux-image-gcp-64k-lts-24.04 6.8.0-1060.63 linux-image-gcp-fips 6.8.0-1060.63+fips1 Available with Ubuntu Pro linux-image-gcp-fips-6.8 6.8.0-1060.63+fips1 Available with Ubuntu Pro linux-image-gcp-lts-24.04 6.8.0-1060.63 linux-image-generic 6.8.0-124.124 linux-image-generic-6.8 6.8.0-124.124 linux-image-generic-64k 6.8.0-124.124 linux-image-generic-64k-6.8 6.8.0-124.124 linux-image-generic-lpae 6.8.0-124.124 linux-image-gke 6.8.0-1055.61 linux-image-gke-6.8 6.8.0-1055.61 linux-image-gke-64k 6.8.0-1055.61 linux-image-gke-64k-6.8 6.8.0-1055.61 linux-image-gkeop 6.8.0-1042.45 linux-image-gkeop-6.8 6.8.0-1042.45 linux-image-ibm 6.8.0-1057.58 linux-image-ibm-6.8 6.8.0-1057.58 linux-image-ibm-classic 6.8.0-1057.58 linux-image-ibm-lts-24.04 6.8.0-1057.58 linux-image-intel-iot-realtime 6.8.1-1052.53 Available with Ubuntu Pro linux-image-intel-iotg 6.8.0-124.124 linux-image-kvm 6.8.0-124.124 linux-image-nvidia 6.8.0-1055.58 linux-image-nvidia-6.8 6.8.0-1055.58 linux-image-nvidia-64k 6.8.0-1055.58 linux-image-nvidia-64k-6.8 6.8.0-1055.58 linux-image-nvidia-lowlatency 6.8.0-1055.58.1 linux-image-nvidia-lowlatency-6.8 6.8.0-1055.58.1 linux-image-nvidia-lowlatency-64k 6.8.0-1055.58.1 linux-image-nvidia-lowlatency-64k-6.8 6.8.0-1055.58.1 linux-image-nvidia-tegra 6.8.0-1026.26 linux-image-nvidia-tegra-6.8 6.8.0-1026.26 linux-image-nvidia-tegra-rt 6.8.0-1026.26 linux-image-nvidia-tegra-rt-6.8 6.8.0-1026.26 linux-image-oracle-6.8 6.8.0-1054.55 linux-image-oracle-64k-6.8 6.8.0-1054.55 linux-image-oracle-64k-lts-24.04 6.8.0-1054.55 linux-image-oracle-lts-24.04 6.8.0-1054.55 linux-image-raspi 6.8.0-1057.61 linux-image-raspi-6.8 6.8.0-1057.61 linux-image-raspi-realtime 6.8.0-2046.47 Available with Ubuntu Pro linux-image-raspi-realtime-6.8 6.8.0-2046.47 Available with Ubuntu Pro linux-image-realtime 6.8.1-1052.53 Available with Ubuntu Pro linux-image-realtime-6.8.1 6.8.1-1052.53 Available with Ubuntu Pro linux-image-virtual 6.8.0-124.124 linux-image-virtual-6.8 6.8.0-124.124 Ubuntu 22.04 LTS linux-image-6.8.0-1054-oracle 6.8.0-1054.55~22.04.1 linux-image-6.8.0-1054-oracle-64k 6.8.0-1054.55~22.04.1 linux-image-6.8.0-1055-nvidia 6.8.0-1055.58~22.04.1 linux-image-6.8.0-1055-nvidia-64k 6.8.0-1055.58~22.04.1 linux-image-6.8.0-1057-aws 6.8.0-1057.60~22.04.1 linux-image-6.8.0-1057-aws-64k 6.8.0-1057.60~22.04.1 linux-image-6.8.0-1057-ibm 6.8.0-1057.58~22.04.1 linux-image-6.8.0-1060-gcp 6.8.0-1060.63~22.04.1 linux-image-6.8.0-1060-gcp-64k 6.8.0-1060.63~22.04.1 linux-image-6.8.0-124-generic 6.8.0-124.124~22.04.1 linux-image-6.8.0-124-generic-64k 6.8.0-124.124~22.04.1 linux-image-6.8.1-1052-realtime 6.8.1-1052.53~22.04.1 Available with Ubuntu Pro linux-image-aws 6.8.0-1057.60~22.04.1 linux-image-aws-6.8 6.8.0-1057.60~22.04.1 linux-image-aws-64k 6.8.0-1057.60~22.04.1 linux-image-aws-64k-6.8 6.8.0-1057.60~22.04.1 linux-image-gcp 6.8.0-1060.63~22.04.1 linux-image-gcp-6.8 6.8.0-1060.63~22.04.1 linux-image-gcp-64k 6.8.0-1060.63~22.04.1 linux-image-gcp-64k-6.8 6.8.0-1060.63~22.04.1 linux-image-generic-6.8 6.8.0-124.124~22.04.1 linux-image-generic-64k-6.8 6.8.0-124.124~22.04.1 linux-image-generic-64k-hwe-22.04 6.8.0-124.124~22.04.1 linux-image-generic-hwe-22.04 6.8.0-124.124~22.04.1 linux-image-ibm-6.8 6.8.0-1057.58~22.04.1 linux-image-nvidia-6.8 6.8.0-1055.58~22.04.1 linux-image-nvidia-64k-6.8 6.8.0-1055.58~22.04.1 linux-image-nvidia-64k-hwe-22.04 6.8.0-1055.58~22.04.1 linux-image-nvidia-hwe-22.04 6.8.0-1055.58~22.04.1 linux-image-oem-22.04 6.8.0-124.124~22.04.1 linux-image-oem-22.04a 6.8.0-124.124~22.04.1 linux-image-oem-22.04b 6.8.0-124.124~22.04.1 linux-image-oem-22.04c 6.8.0-124.124~22.04.1 linux-image-oem-22.04d 6.8.0-124.124~22.04.1 linux-image-oracle 6.8.0-1054.55~22.04.1 linux-image-oracle-6.8 6.8.0-1054.55~22.04.1 linux-image-oracle-64k 6.8.0-1054.55~22.04.1 linux-image-oracle-64k-6.8 6.8.0-1054.55~22.04.1 linux-image-realtime-6.8.1 6.8.1-1052.53~22.04.1 Available with Ubuntu Pro linux-image-realtime-hwe-22.04 6.8.1-1052.53~22.04.1 Available with Ubuntu Pro linux-image-virtual-6.8 6.8.0-124.124~22.04.1 linux-image-virtual-hwe-22.04 6.8.0-124.124~22.04.1 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-8373-1 CVE-2026-31676, CVE-2026-43284, CVE-2026-43494, CVE-2026-43500, CVE-2026-43503, CVE-2026-45998, CVE-2026-46000, CVE-2026-46300, CVE-2026-46333, CVE-2026-47326, CVE-2026-47327, CVE-2026-47328, CVE-2026-47329, CVE-2026-47330, CVE-2026-47331, CVE-2026-47332, CVE-2026-47333, CVE-2026-47334, CVE-2026-47335, CVE-2026-47336, CVE-2026-47337 Package Information: https://launchpad.net/ubuntu/+source/linux/6.8.0-124.124 https://launchpad.net/ubuntu/+source/linux-aws/6.8.0-1057.60 https://launchpad.net/ubuntu/+source/linux-aws-fips/6.8.0... https://launchpad.net/ubuntu/+source/linux-azure/6.8.0-10... https://launchpad.net/ubuntu/+source/linux-fips/6.8.0-124... https://launchpad.net/ubuntu/+source/linux-gcp/6.8.0-1060.63 https://launchpad.net/ubuntu/+source/linux-gcp-fips/6.8.0... https://launchpad.net/ubuntu/+source/linux-gke/6.8.0-1055.61 https://launchpad.net/ubuntu/+source/linux-gkeop/6.8.0-10... https://launchpad.net/ubuntu/+source/linux-ibm/6.8.0-1057.58 https://launchpad.net/ubuntu/+source/linux-nvidia/6.8.0-1... https://launchpad.net/ubuntu/+source/linux-nvidia-lowlate... https://launchpad.net/ubuntu/+source/linux-nvidia-tegra/6... https://launchpad.net/ubuntu/+source/linux-oracle/6.8.0-1... https://launchpad.net/ubuntu/+source/linux-raspi/6.8.0-10... https://launchpad.net/ubuntu/+source/linux-raspi-realtime... https://launchpad.net/ubuntu/+source/linux-realtime/6.8.1... https://launchpad.net/ubuntu/+source/linux-aws-6.8/6.8.0-... https://launchpad.net/ubuntu/+source/linux-gcp-6.8/6.8.0-... https://launchpad.net/ubuntu/+source/linux-hwe-6.8/6.8.0-... https://launchpad.net/ubuntu/+source/linux-ibm-6.8/6.8.0-... https://launchpad.net/ubuntu/+source/linux-nvidia-6.8/6.8... https://launchpad.net/ubuntu/+source/linux-oracle-6.8/6.8... https://launchpad.net/ubuntu/+source/linux-realtime-6.8/6...
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