ESB-2026.4848

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4848 USN-8254-1: Linux kernel vulnerabilities 8 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Linux kernel Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2026-23273 CVE-2026-23231 CVE-2026-23112 Original Bulletin: https://ubuntu.com/security/notices/USN-8254-1 Comment: CVSS (Max): 9.8 CVE-2026-23112 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) CVSS Source: kernel.org Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H EPSS (Max): 0.7% (71st) CVE-2026-23231 2026-05-07 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-8254-1: Linux kernel vulnerabilities Publication date 7 May 2026 Overview Several security issues were fixed in the Linux kernel. Releases 24.04 LTS 22.04 LTS --------------------------------------------------------------------------------- Open side navigation Packages o linux - Linux kernel o linux-aws - Linux kernel for Amazon Web Services (AWS) systems o linux-aws-6.8 - Linux kernel for Amazon Web Services (AWS) systems o linux-aws-fips - Linux kernel for Amazon Web Services (AWS) systems with FIPS o linux-fips - Linux kernel with FIPS o linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems o linux-gcp-fips - Linux kernel for Google Cloud Platform (GCP) systems with FIPS o linux-gke - Linux kernel for Google Container Engine (GKE) systems o linux-gkeop - Linux kernel for Google Container Engine (GKE) systems o linux-hwe-6.8 - Linux hardware enablement (HWE) kernel o linux-ibm - Linux kernel for IBM cloud systems o linux-ibm-6.8 - Linux kernel for IBM cloud systems o linux-lowlatency - Linux low latency kernel o linux-lowlatency-hwe-6.8 - Linux low latency kernel o linux-oracle - Linux kernel for Oracle Cloud systems o linux-oracle-6.8 - Linux kernel for Oracle Cloud systems o linux-raspi - Linux kernel for Raspberry Pi systems o linux-raspi-realtime - Linux kernel for Raspberry Pi Real-time systems o linux-realtime - Linux kernel for Real-time systems o linux-realtime-6.8 - Linux kernel for Real-time systems Details 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: o Network drivers; o NVME drivers; o Netfilter Update instructions 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. The problem can be corrected by updating your system to the following package versions: Ubuntu Package Version Release linux-image-6.8.0-1038-gkeop - 6.8.0-1038.41 linux-image-6.8.0-1050-oracle - 6.8.0-1050.51 linux-image-6.8.0-1050-oracle-64k - 6.8.0-1050.51 linux-image-6.8.0-1051-gke - 6.8.0-1051.57 linux-image-6.8.0-1051-gke-64k - 6.8.0-1051.57 linux-image-6.8.0-1052-ibm - 6.8.0-1052.52 linux-image-6.8.0-1053-aws - 6.8.0-1053.56 linux-image-6.8.0-1053-aws-64k - 6.8.0-1053.56 linux-image-6.8.0-1053-aws-fips - 6.8.0-1053.56+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-6.8.0-1053-raspi - 6.8.0-1053.57 linux-image-6.8.0-1055-gcp - 6.8.0-1055.58 linux-image-6.8.0-1055-gcp-64k - 6.8.0-1055.58 linux-image-6.8.0-1055-gcp-fips - 6.8.0-1055.58+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-6.8.0-111-fips - 6.8.0-111.111+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-6.8.0-111-generic - 6.8.0-111.111 linux-image-6.8.0-111-generic-64k - 6.8.0-111.111 linux-image-6.8.0-111-lowlatency - 6.8.0-111.111.1 linux-image-6.8.0-111-lowlatency-64k - 6.8.0-111.111.1 linux-image-6.8.0-2043-raspi-realtime - 6.8.0-2043.44 Real-time Real-time kernel available with Ubuntu Pro. linux-image-6.8.1-1048-realtime - 6.8.1-1048.49 Real-time Real-time kernel available with Ubuntu Pro. linux-image-aws-6.8 - 6.8.0-1053.56 linux-image-aws-64k-6.8 - 6.8.0-1053.56 linux-image-aws-64k-lts-24.04 - 6.8.0-1053.56 linux-image-aws-fips - 6.8.0-1053.56+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-aws-fips-6.8 - 6.8.0-1053.56+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-aws-lts-24.04 - 6.8.0-1053.56 linux-image-fips - 6.8.0-111.111+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-fips-6.8 - 6.8.0-111.111+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-gcp-6.8 - 6.8.0-1055.58 linux-image-gcp-64k-6.8 - 6.8.0-1055.58 24.04 linux-image-gcp-64k-lts-24.04 - 6.8.0-1055.58 LTS linux-image-gcp-fips - 6.8.0-1055.58+fips1 FIPS Updates FIPS-140 noble certified package with security fixes. Available with Ubuntu Pro. linux-image-gcp-fips-6.8 - 6.8.0-1055.58+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-gcp-lts-24.04 - 6.8.0-1055.58 linux-image-generic - 6.8.0-111.111 linux-image-generic-6.8 - 6.8.0-111.111 linux-image-generic-64k - 6.8.0-111.111 linux-image-generic-64k-6.8 - 6.8.0-111.111 linux-image-generic-lpae - 6.8.0-111.111 linux-image-gke - 6.8.0-1051.57 linux-image-gke-6.8 - 6.8.0-1051.57 linux-image-gke-64k - 6.8.0-1051.57 linux-image-gke-64k-6.8 - 6.8.0-1051.57 linux-image-gkeop - 6.8.0-1038.41 linux-image-gkeop-6.8 - 6.8.0-1038.41 linux-image-ibm - 6.8.0-1052.52 linux-image-ibm-6.8 - 6.8.0-1052.52 linux-image-ibm-classic - 6.8.0-1052.52 linux-image-ibm-lts-24.04 - 6.8.0-1052.52 linux-image-intel-iot-realtime - 6.8.1-1048.49 Real-time Real-time kernel available with Ubuntu Pro. linux-image-intel-iotg - 6.8.0-111.111 linux-image-kvm - 6.8.0-111.111 linux-image-lowlatency - 6.8.0-111.111.1 linux-image-lowlatency-6.8 - 6.8.0-111.111.1 linux-image-lowlatency-64k - 6.8.0-111.111.1 linux-image-lowlatency-64k-6.8 - 6.8.0-111.111.1 linux-image-oracle-6.8 - 6.8.0-1050.51 linux-image-oracle-64k-6.8 - 6.8.0-1050.51 linux-image-oracle-64k-lts-24.04 - 6.8.0-1050.51 linux-image-oracle-lts-24.04 - 6.8.0-1050.51 linux-image-raspi - 6.8.0-1053.57 linux-image-raspi-6.8 - 6.8.0-1053.57 linux-image-raspi-realtime - 6.8.0-2043.44 Real-time Real-time kernel available with Ubuntu Pro. linux-image-raspi-realtime-6.8 - 6.8.0-2043.44 Real-time Real-time kernel available with Ubuntu Pro. linux-image-realtime - 6.8.1-1048.49 Real-time Real-time kernel available with Ubuntu Pro. linux-image-realtime-6.8.1 - 6.8.1-1048.49 Real-time Real-time kernel available with Ubuntu Pro. linux-image-virtual - 6.8.0-111.111 linux-image-virtual-6.8 - 6.8.0-111.111 linux-image-6.8.0-1050-oracle - 6.8.0-1050.51~22.04.1 linux-image-6.8.0-1050-oracle-64k - 6.8.0-1050.51~22.04.1 linux-image-6.8.0-1052-ibm - 6.8.0-1052.52~22.04.1 linux-image-6.8.0-1053-aws - 6.8.0-1053.56~22.04.1 linux-image-6.8.0-1053-aws-64k - 6.8.0-1053.56~22.04.1 linux-image-6.8.0-111-generic - 6.8.0-111.111~22.04.1 linux-image-6.8.0-111-generic-64k - 6.8.0-111.111~22.04.1 linux-image-6.8.0-111-lowlatency - 6.8.0-111.111.1~22.04.1 linux-image-6.8.0-111-lowlatency-64k - 6.8.0-111.111.1~22.04.1 linux-image-6.8.1-1048-realtime - 6.8.1-1048.49~22.04.1 Real-time Real-time kernel available with Ubuntu Pro. linux-image-aws - 6.8.0-1053.56~22.04.1 linux-image-aws-6.8 - 6.8.0-1053.56~22.04.1 linux-image-aws-64k - 6.8.0-1053.56~22.04.1 linux-image-aws-64k-6.8 - 6.8.0-1053.56~22.04.1 linux-image-generic-6.8 - 6.8.0-111.111~22.04.1 linux-image-generic-64k-6.8 - 6.8.0-111.111~22.04.1 linux-image-generic-64k-hwe-22.04 - 6.8.0-111.111~22.04.1 22.04 linux-image-generic-hwe-22.04 - 6.8.0-111.111~22.04.1 LTS linux-image-ibm-6.8 - 6.8.0-1052.52~22.04.1 jammy linux-image-lowlatency-6.8 - 6.8.0-111.111.1~22.04.1 linux-image-lowlatency-64k-6.8 - 6.8.0-111.111.1~22.04.1 linux-image-lowlatency-64k-hwe-22.04 - 6.8.0-111.111.1~22.04.1 linux-image-lowlatency-hwe-22.04 - 6.8.0-111.111.1~22.04.1 linux-image-oem-22.04 - 6.8.0-111.111~22.04.1 linux-image-oem-22.04a - 6.8.0-111.111~22.04.1 linux-image-oem-22.04b - 6.8.0-111.111~22.04.1 linux-image-oem-22.04c - 6.8.0-111.111~22.04.1 linux-image-oem-22.04d - 6.8.0-111.111~22.04.1 linux-image-oracle - 6.8.0-1050.51~22.04.1 linux-image-oracle-6.8 - 6.8.0-1050.51~22.04.1 linux-image-oracle-64k - 6.8.0-1050.51~22.04.1 linux-image-oracle-64k-6.8 - 6.8.0-1050.51~22.04.1 linux-image-realtime-6.8.1 - 6.8.1-1048.49~22.04.1 Real-time Real-time kernel available with Ubuntu Pro. linux-image-realtime-hwe-22.04 - 6.8.1-1048.49~22.04.1 Real-time Real-time kernel available with Ubuntu Pro. linux-image-virtual-6.8 - 6.8.0-111.111~22.04.1 linux-image-virtual-hwe-22.04 - 6.8.0-111.111~22.04.1 --------------------------------------------------------------------------------- References o CVE-2026-23273 o CVE-2026-23231 o CVE-2026-23112 Related notices o USN-8245-1 o USN-8244-1 --------------------------------------------------------------------------------- - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================