kernel: xen: Xen hypercall page unsafe against speculative attacks (Xen Security Advisory 466)

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...

DEBIAN-CVE-2023-52994

In the Linux kernel, the following vulnerability has been resolved: acpi: Fix suspend with Xen PV Commit f1e525009493 "x86/boot: Skip realmode init code when running as Xen PV guest" missed one code path accessing realmodeheader, leading to dereferencing NULL when suspending the system under Xen:...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that originates from a null pointer dereference that occurs when the system hangs in the Xen PV environment...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from the x86/xen architecture handling PV iret hypercall incorrectly called via the hypercall page...

SUSE 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...

PT-2024-10469

Name of the Vulnerable Software and Affected Versions Xen affected versions not specified Description The issue is related to the construction of ACPI tables for PVH guests by the toolstack, which involves building the tables in local memory before copying them into guest memory. The excess space...

CLSA-2024-1721660263 Fix of 96 CVEs

CVE-url: https://ubuntu.com/security/CVE-2024-35902 - net/rds: fix possible cp null dereference CVE-url: https://ubuntu.com/security/CVE-2024-38587 - speakup: Fix sizeof vs ARRAYSIZE bug CVE-url: https://ubuntu.com/security/CVE-2024-39493 - crypto: qat - Fix ADFDEVRESETSYNC memory leak CVE-url:...

DEBIAN-CVE-2021-4440

In the Linux kernel, the following vulnerability has been resolved: x86/xen: Drop USERGSSYSRET64 paravirt call commit afd30525a659ac0ae0904f0cb4a2ca75522c3123 upstream. USERGSSYSRET64 is used to return from a syscall via SYSRET, but a Xen PV guest will nevertheless use the IRET hypercall, as ther...

PT-2024-11037 · Linux +2 · Linux Kernel +2

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: The vulnerability is related to the x86/xen paravirt call in the Linux kernel. Specifically, the USERGS SYSRET64 call is used to return from a syscall via SYSRET, but a Xen PV guest wi...

DEBIAN-CVE-2024-26816

In the Linux kernel, the following vulnerability has been resolved: x86, relocs: Ignore relocations in .notes section When building with CONFIGXENPV=y, .text symbols are emitted into the .notes section so that Xen can find the "startupxen" entry point. This information is used prior to booting th...

UBUNTU-CVE-2024-26816

In the Linux kernel, the following vulnerability has been resolved: x86, relocs: Ignore relocations in .notes section When building with CONFIGXENPV=y, .text symbols are emitted into the .notes section so that Xen can find the "startupxen" entry point. This information is used prior to booting th...

DEBIAN-CVE-2021-47112

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Teardown PV features on boot CPU as well Various PV features Async PF, PV EOI, steal time work through memory shared with hypervisor and when we restore from hibernation we must properly teardown all these features to ma...

UBUNTU-CVE-2021-47112

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Teardown PV features on boot CPU as well Various PV features Async PF, PV EOI, steal time work through memory shared with hypervisor and when we restore from hibernation we must properly teardown all these features to ma...

DEBIAN-CVE-2023-34322

For migration as well as to work around kernels unaware of L1TF see XSA-273, PV guests may be run in shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run directly the respective shadow page tables. For 64-bit PV guests this means running on th...

OESA-2023-1896 qemu security update

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed. Security Fixes: A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. This flaw allows a crafted guest driver to allocate and initialize a huge number of page tables to be used...

UBUNTU-CVE-2023-1544

A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. This flaw allows a crafted guest driver to allocate and initialize a huge number of page tables to be used as a ring of descriptors for CQ and async events, potentially leading to an out-of-bounds read and crash of...

PT-2023-2365

Name of the Vulnerable Software and Affected Versions QEMU affected versions not specified Description A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. This flaw allows a crafted guest driver to allocate and initialize a huge number of page tables to be used as a...

SUSE CVE-2010-4255

The fixuppagefault function in arch/x86/traps.c in Xen 4.0.1 and earlier on 64-bit platforms, when paravirtualization is enabled, does not verify that kernel mode is used to call the handlegdtldtmappingfault function, which allows guest OS users to cause a denial of service host OS BUGON via a...

SUSE CVE-2011-1166

Xen, possibly before 4.0.2, allows local 64-bit PV guests to cause a denial of service host crash by specifying user mode execution without user-mode pagetables...

SUSE CVE-2013-1917

Xen 3.1 through 4.x, when running 64-bit hosts on Intel CPUs, does not clear the NT flag when using an IRET after a SYSENTER instruction, which allows PV guest users to cause a denial of service hypervisor crash by triggering a GP fault, which is not properly handled by another IRET instruction...