Ubuntu alert USN-8098-9 (linux-ibm-5.4)
| From: | Giampaolo Fresi Roglia <giampaolo.fresi.roglia@canonical.com> | |
| To: | ubuntu-security-announce@lists.ubuntu.com | |
| Subject: | [USN-8098-9] Linux kernel (IBM) vulnerabilities | |
| Date: | Fri, 27 Mar 2026 09:57:05 +0100 | |
| Message-ID: | <ap4oulqzp5tztq.fsf@canonical.com> |
========================================================================== Ubuntu Security Notice USN-8098-9 March 27, 2026 linux-ibm-5.4 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-ibm-5.4: Linux kernel for IBM cloud systems Details: Qualys discovered that several vulnerabilities existed in the AppArmor Linux kernel Security Module (LSM). An unprivileged local attacker could use these issues to load, replace, and remove arbitrary AppArmor profiles causing denial of service, exposure of sensitive information (kernel memory), local privilege escalation, or possibly escape a container. (LP: #2143853) 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: - x86 architecture; - GPIO subsystem; - GPU drivers; - BTRFS file system; - XFRM subsystem; - IPv4 networking; - IPv6 networking; - MAC80211 subsystem; - SMC sockets; (CVE-2021-47599, CVE-2022-48875, CVE-2022-49072, CVE-2024-49927, CVE-2024-56640, CVE-2025-21780, CVE-2025-40215) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS linux-image-5.4.0-1102-ibm 5.4.0-1102.107~18.04.1 Available with Ubuntu Pro linux-image-ibm 5.4.0.1102.107~18.04.1 Available with Ubuntu Pro linux-image-ibm-5.4 5.4.0.1102.107~18.04.1 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-8098-9 https://ubuntu.com/security/notices/USN-8098-8 https://ubuntu.com/security/notices/USN-8098-7 https://ubuntu.com/security/notices/USN-8098-6 https://ubuntu.com/security/notices/USN-8098-5 https://ubuntu.com/security/notices/USN-8098-4 https://ubuntu.com/security/notices/USN-8098-3 https://ubuntu.com/security/notices/USN-8098-2 https://ubuntu.com/security/notices/USN-8098-1 https://launchpad.net/bugs/2143853 CVE-2021-47599, CVE-2022-48875, CVE-2022-49072, CVE-2022-49267, CVE-2024-49927, CVE-2024-56640, CVE-2025-21780, CVE-2025-40215,
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