CVE-2024-53241

In the Linux kernel, the following vulnerability has been resolved: x86/xen: don't do PV iret hypercall through hypercall page Instead of jumping to the Xen hypercall page for doing the iret hypercall, directly code the required sequence in xen-asm.S. This is done in preparation of no longer usin...

Xen hypercall page unsafe against speculative attacks

ISSUE DESCRIPTION Xen guests need to use different processor instructions to make explicit calls into the Xen hypervisor depending on guest type and/or CPU vendor. In order to hide those differences, the hypervisor can fill a hypercall page with the needed instruction sequences, allowing the gues...

Debian DSA-5378-1 : xen - security update

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5378 advisory. - IBPB may not prevent return branch predictions from being specified by pre-IBPB branch targets leading to a potential information disclosure. CVE-2022-23824 -...

Code injection

x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original Spectre/Meltdown security work XSA-254, one entrypath performs its speculation-safety actions too late. In some configurations, there is an unprotected RET instruction which can be attacked with a variet...

CVE-2022-42331

x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original Spectre/Meltdown security work XSA-254, one entrypath performs its speculation-safety actions too late. In some configurations, there is an unprotected RET instruction which can be attacked with a variet...