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USN-8726-1: Linux kernel vulnerabilities

Ubuntu issued kernel security update USN-8726-1 fixing an Arm TLB invalidation flaw (CVE-2025-10263) that enables local privilege escalation, plus other kernel fixes.

Ubuntu released USN-8726-1, a security update for the generic Linux kernel. It fixes CVE-2025-10263, where certain Arm processors complete broadcast TLB invalidation before related memory writes are globally observed, potentially letting local attackers bypass memory protections or escalate privileges. The update also addresses additional kernel flaws in ARM64, ARM32, RISC-V, S390 and other subsystems.

Ubuntu Security Noticesupdated Sep 7, 09:12 UTC · 9d agofirst Sep 7, 08:57 UTC · 9d agoAdvisory 6 sources CVE-2025-10263

Chipmaker Patch Tuesday: Nvidia, AMD, Arm Issue Security Advisories

AMD, Arm, and Nvidia issued Patch Tuesday advisories fixing a Linux GPU driver DoS flaw, nine Mali GPU vulnerabilities, and two high-severity Triton defects.

AMD fixed CVE-2026-43603, a NULL pointer dereference in its Linux GPU kernel driver that can crash systems and cause denial-of-service, credited to SecMate researchers, with patches for EPYC, Ryzen, Radeon, and Instinct shipped in July and embedded variants due in October. Arm published an advisory covering nine Mali GPU vulnerabilities allowing use-after-free access, kernel information leaks, or DoS, releasing fixes for Valhall and 5th Gen GPU Architecture drivers, with Bifrost also affected. Nvidia updated Triton Inference Server for Linux to resolve two high-severity flaws, one causing DoS and one enabling information disclosure, data tampering, and DoS. Intel had issued no new advisories since the previous Patch Tuesday.

SecurityWeekSep 9, 16:22 UTC · 7d agoAdvisory CVE-2026-43603