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ZDI-26-639: Oracle VirtualBox VMSVGA Heap-based Buffer Overflow Local Privilege Escalation Vulnerability

ZDI disclosed a heap-based buffer overflow in Oracle VirtualBox's VMSVGA component (CVE-2026-71116) enabling local privilege escalation.

Zero Day Initiative published ZDI-26-639, a CVSS 7.5 heap-based buffer overflow in the VMSVGA component of Oracle VirtualBox. Local attackers who already execute high-privileged code on the guest system can leverage the flaw to escalate privileges on affected installations. The vulnerability is tracked as CVE-2026-71116. No exploitation is reported.

The extension you never installed: KREMLIN forges Chrome's own integrity checks to steal banking sessions

Elastic details KREMLIN, a Brazilian banking malware whose malicious Chrome/Edge extension forges Chromium integrity checks to steal sessions.

Elastic Security Labs tracked operation REF9334 and its KREMLIN toolkit, a Brazilian banking malware campaign impersonating twelve banks across seven campaigns since May 2025. The infection chain uses multi-stage obfuscated JavaScript loaders with sandbox checks (file and process counting), scheduled-task persistence, and an Ethereum smart contract acting as a dead-drop resolver for C2 and payload URLs, abusing Archive.org for hosting. The malicious browser extension bypasses Chromium integrity mechanisms by manipulating Secure Preferences and regenerating required HMACs and App-Bound encrypted hashes. Threat Command disrupted over 1,500 infections by registering the kill-switch canary domain.

Elastic Security Labs · 3d agoMalware in the wild

Oracle Corporation security advisory (AV26-929)

CCCS relays Oracle's September 2026 Critical Patch Update fixing vulnerabilities across WebLogic, Database, E-Business Suite, PeopleSoft, Siebel, and dozens more products.

The Canadian Centre for Cyber Security (AV26-929) relays Oracle's September 2026 Critical Security Patch Update, which addresses vulnerabilities in dozens of product families as of September 15, 2026. Affected products include Oracle WebLogic Server, Database Server, E-Business Suite, Fusion Middleware, PeopleSoft Enterprise, Siebel Applications, GraalVM, VirtualBox, Coherence, and numerous banking and communications suites. The bulletin lists no CVE identifiers and encourages administrators to review Oracle's advisory and apply patches.