Ubuntu USN-8530-2: Linux Kernel Privilege Escalation Vulnerability Advisory

Vulnerability Overview Vulnerability ID: USN-8530-2 Publication Date: August 13, 2026 Description: - The Linux kernel contains multiple security vulnerabilities when handling shared page fragments, including Dirty Frag, Fragnesia, and others. - Attackers may exploit these vulnerabilities to escalate privileges or escape containers. Affected Systems Affected Systems: Linux Kernel (HWE) Specific Vulnerabilities: - CVE-2026-43284 - CVE-2026-43503 - Other related CVEs (see References section) Remediation Updated Package Versions: - – 4.15.0-1195.208~16.04.1 - – 4.15.0.1195.208~16.04.1 Steps: 1. Update the system to the package versions listed above. 2. Reboot the machine to apply all necessary changes. 3. Note: Due to ABI changes, you may need to recompile and install third-party kernel modules. Additional Information References: - CVE-2026-46243 - CVE-2026-46119 - CVE-2026-46043 - CVE-2026-45988 - CVE-2026-43503 - CVE-2026-43414 - CVE-2026-43407 - CVE-2026-43383 - CVE-2026-43284 - CVE-2026-43038 Related Notices: - USN-8635-1 - USN-8634-1 - USN-8619-1 - USN-8617-1 - USN-8616-1 - USN-8615-1 - USN-8615-2 - USN-8609-1 - USN-8607-1 - USN-8606-1 Security Advice To Reduce Risk: - Use Ubuntu Pro for ten years of security coverage for 25,000+ packages. - Free protection is available for up to five machines. Summary This page details multiple security vulnerabilities in the Linux kernel and their respective fixes, emphasizing the importance of timely system updates, and provides relevant references and security advice.

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Ubuntu USN-8530-2: Linux Kernel Privilege Escalation Vulnerability Advisory