importantSYS.SOURCE: The Hacker News• 2026-11-04T17:16:27+05:30

Xen Hypervisor Vulnerabilities Enable Cross-VM Memory Access Attacks

#vulnerability #hypervisor #security #memory-attack #cloud-security

Two critical vulnerabilities in the Xen hypervisor permit a malicious guest VM to read and write memory of other VMs, including the privileged dom0. Patches have been released, but no immediate mitigation is available according to the Xen Project advisory.

Two flaws in the Xen hypervisor allow a malicious guest virtual machine (VM) to read and write the memory of other VMs on the same host, including dom0.

Dom0 is the VM that, by default, has full permissions and manages the others. Patches are out, and there is no known mitigation, the Xen Project said in an advisory on November 3.

All Xen versions from 4.6 onward are vulnerable,

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> DEBIAN APT SECURITY UPDATE: MAN-IN-THE-MIDDLE ARBITRARY CODE EXECUTION > INTERACTIVE MAP OF 5000+ 2026 MIDTERM ELECTION ADVERTISEMENTS > CYBERATTACK ON FRENCH NATIONAL BLOOD BANK DISRUPTS OPERATIONS > CRITICAL RUBY ON RAILS VULNERABILITY ENABLES ARBITRARY FILE WRITING THROUGH IMAGEMAGICK UPLOADS > CANVA ANNOUNCES 22% STAFF REDUCTION AMID GROWTH SLOWDOWN AND STRATEGIC RESTRUCTURING > PHP2SHELL VULNERABILITY EXPOSES 40 YEARS OF TECHNICAL DEBT IN CYBERSECURITY > XEN HYPERVISOR VULNERABILITIES ENABLE CROSS-VM MEMORY ACCESS ATTACKS > AGENT RUNTIME SECURITY LIMITATIONS IN UNMONITORED TRAFFIC ENVIRONMENTS > CHINA-ALIGNED THREAT ACTOR EXPLOITS SOGOU INPUT METHOD VULNERABILITY FOR DARKVIGIL DEPLOYMENT > SYNAPTICS APPEARS TO USE LEGAL THREATS TO BLOCK OPEN-SOURCE DISPLAYLINK DRIVER> DEBIAN APT SECURITY UPDATE: MAN-IN-THE-MIDDLE ARBITRARY CODE EXECUTION > INTERACTIVE MAP OF 5000+ 2026 MIDTERM ELECTION ADVERTISEMENTS > CYBERATTACK ON FRENCH NATIONAL BLOOD BANK DISRUPTS OPERATIONS > CRITICAL RUBY ON RAILS VULNERABILITY ENABLES ARBITRARY FILE WRITING THROUGH IMAGEMAGICK UPLOADS > CANVA ANNOUNCES 22% STAFF REDUCTION AMID GROWTH SLOWDOWN AND STRATEGIC RESTRUCTURING > PHP2SHELL VULNERABILITY EXPOSES 40 YEARS OF TECHNICAL DEBT IN CYBERSECURITY > XEN HYPERVISOR VULNERABILITIES ENABLE CROSS-VM MEMORY ACCESS ATTACKS > AGENT RUNTIME SECURITY LIMITATIONS IN UNMONITORED TRAFFIC ENVIRONMENTS > CHINA-ALIGNED THREAT ACTOR EXPLOITS SOGOU INPUT METHOD VULNERABILITY FOR DARKVIGIL DEPLOYMENT > SYNAPTICS APPEARS TO USE LEGAL THREATS TO BLOCK OPEN-SOURCE DISPLAYLINK DRIVER