UBUNTU-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...

CVE-2024-53241

CVE-2024-53241 affects the Linux kernel when running with Xen PV guests. The root cause is an unsafe PV iret hypercall path via the Xen hypercall page. The fix replaces the hypercall-page jump with an inlined sequence in xen-asm.S to stop using the hypercall page, preparing for its removal due to...

CVE-2024-53241 x86/xen: don't do PV iret hypercall through hypercall page

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...

CVE-2024-53241 x86/xen: don't do PV iret hypercall through hypercall page

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...

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...

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...

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...

kernel: x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction

A compatibility issue was found between Linux and Hyper-V when Indirect Branch Tracking IBT is enabled. The Hyper-V hypercall page lacks the required ENDBR64 instruction, causing all hypercalls to fail with an exception and panic the guest...

The vulnerability of the x86 HVM Hypercall Handler component of the cross-platform hypervisor Xen in the Linux operating system allows a attacker to trigger a service failure.

The vulnerability of the x86 HVM Hypercall Handler component in the cross-platform hypervisor Xen for Linux operating systems is related to the ability to freely switch between 64-bit and other system modes. Exploiting this vulnerability could allow an attacker to trigger a service failure...

ROS-20240916-09

The vulnerability of the x86 HVM Hypercall Handler component of the Xen kernel's x86 HVM hypervisor is related to the ability to freely switch between 64-bit and other system modes. Linux kernel hypervisor is related to the ability to freely switch between 64-bit and other system modes...

kernel: powerpc/pseries: Enforce hcall result buffer validity and size

A vulnerability was found in the Linux kernel's powerpc/pseries architecture, where certain hypercall functions did not properly enforce the validity and size of result buffers provided by callers, lead to stack corruption if the buffer is too small, as the lack of compiler checks allows for...

CVE-2021-4440 x86/xen: Drop USERGS_SYSRET64 paravirt call

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...

CVE-2021-4440 x86/xen: Drop USERGS_SYSRET64 paravirt call

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...

CVE-2023-52874

In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Zero out the missing RSI in TDXHYPERCALL macro In the TDXHYPERCALL asm, after the TDCALL instruction returns from the untrusted VMM, the registers that the TDX guest shares to the VMM need to be cleared to avoid...

SUSE CVE-2023-52874

In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Zero out the missing RSI in TDXHYPERCALL macro In the TDXHYPERCALL asm, after the TDCALL instruction returns from the untrusted VMM, the registers that the TDX guest shares to the VMM need to be cleared to avoid...

kernel: x86/sev: Make enc_dec_hypercall() accept a size instead of npages

In the Linux kernel, the following vulnerability has been resolved: x86/sev: Make encdechypercall accept a size instead of npages encdechypercall accepted a page count instead of a size, which forced its callers to round up. As a result, non-page aligned vaddrs caused pages to be spuriously marke...

CVE-2023-52874

In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Zero out the missing RSI in TDXHYPERCALL macro In the TDXHYPERCALL asm, after the TDCALL instruction returns from the untrusted VMM, the registers that the TDX guest shares to the VMM need to be cleared to avoid...

DEBIAN-CVE-2023-52874

In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Zero out the missing RSI in TDXHYPERCALL macro In the TDXHYPERCALL asm, after the TDCALL instruction returns from the untrusted VMM, the registers that the TDX guest shares to the VMM need to be cleared to avoid...

DEBIAN-CVE-2023-46842

Unlike 32-bit PV guests, HVM guests may switch freely between 64-bit and other modes. This in particular means that they may set registers used to pass 32-bit-mode hypercall arguments to values outside of the range 32-bit code would be able to set them to. When processing of hypercalls takes a...