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Microsoft discloses 5 critical vulnerabilities in June's Patch Tuesday, no zero
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ZDI-26-685: Linux Kernel NFC NCI UART Driver Race Condition Local Privilege Escalation Vulnerability
ZDI discloses a race condition in the Linux kernel NFC NCI UART driver (CVE-2025-38416, CVSS 8.8) allowing local low-privileged attackers to escalate privileges.
ZDI advisory ZDI-26-685 covers a race condition vulnerability in the Linux kernel's NFC NCI UART driver, tracked as CVE-2025-38416 with a CVSS score of 8.8. A local attacker with the ability to execute low-privileged code can exploit the race to escalate privileges on affected systems. Exposure is limited to systems where the NFC NCI UART driver is present, and no exploitation is reported.
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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.
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Exploring malicious Windows drivers (Part 2): the I/O system, IRPs, stack locations, IOCTLs and more
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Microsoft September 2026 Patch Tuesday fixes 966 flaws, 2 zero-days
Microsoft's September 2026 Patch Tuesday fixes a record 966 flaws, including two Windows zero-days actively exploited to gain SYSTEM privileges.
Microsoft's September 2026 Patch Tuesday addresses a record 966 vulnerabilities, including 105 rated Critical, 81 of them remote code execution bugs. Two zero-days were actively exploited: a Windows Update Stack link-following flaw and a Windows ALPC heap-based buffer overflow, both allowing local elevation to SYSTEM privileges. The ALPC flaw was reported by Volexity and Proofpoint researchers, while the Update Stack flaw was credited to Romain Deperne and the Microsoft Threat Intelligence Centre. Microsoft shared no details on how the flaws were exploited in attacks.
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Windows memory integrity switches on automatically for eligible devices in October 2026
Microsoft's Windows quality updates will automatically enable memory integrity and Virtualization-based Security on eligible devices starting October 2026.
Beginning in October 2026, Windows quality updates will automatically enable memory integrity on eligible devices and turn on Virtualization-based Security where it is not already running. Memory integrity restricts kernel-mode execution to trusted, signed code and drivers, blocking kernel compromise and rootkits. Microsoft said existing administrator decisions remain in effect, and readiness checks weigh hardware capability, compatibility, and performance. Memory integrity also underpins hotpatch updates that install without a reboot, so unprotected devices are excluded from that servicing model.
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