CVE-2022-2196

A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesn't need retpolines or IBPB after running L2 due to KVM L0 advertising eIBRS support to L1. An attacker at L2 with code...

Design/Logic Flaw

A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesn't need retpolines or IBPB after running L2 due to KVM L0 advertising eIBRS support to L1. An attacker at L2 with code...

CVE-2022-2196

A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesn't need retpolines or IBPB after running L2 due to KVM L0 advertising eIBRS support to L1. An attacker at L2 with code...

CVE-2022-2196 Speculative execution attacks in KVM VMX

A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesn't need retpolines or IBPB after running L2 due to KVM L0 advertising eIBRS support to L1. An attacker at L2 with code...

CVE-2022-2196 Speculative execution attacks in KVM VMX

A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesn't need retpolines or IBPB after running L2 due to KVM L0 advertising eIBRS support to L1. An attacker at L2 with code...

CVE-2022-2196 Speculative execution attacks in KVM VMX

A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesn't need retpolines or IBPB after running L2 due to KVM L0 advertising eIBRS support to L1. An attacker at L2 with code...

CVE-2022-2196

The CVE-2022-2196 entry concerns a regression in Linux kernel KVM/nVMX where speculative execution could leak from an L2 guest to the host L1 due to inadequate Spectre v2 mitigations (retpolines/IBPB/eIBRS context). The description states an L2 attacker with code execution can influence indirect ...

SUSE SLES12: xen / xen-doc-html / xen-libs / xen-libs-32bit / xen-tools / etc (SUSE-SU-2022:4241-1)

The remote SUSE Linux SLES12 / SLESSAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:4241-1 advisory. - CVE-2022-33746: Fixed DoS due to excessively long P2M pool freeing bsc1203806. - CVE-2022-33748: Fixed DoS due to race in locking...

SUSE SLES15 Security Update : xen (SUSE-SU-2022:3925-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:3925-1 advisory. - CVE-2022-33746: Fixed DoS due to excessively long P2M pool freeing bsc1203806. - CVE-2022-33748: Fixed DoS due to race in locking...

Retbleed - arbitrary speculative code execution with return instructions

ISSUE DESCRIPTION Researchers at ETH Zurich have discovered Retbleed, allowing for arbitrary speculative execution in a victim context. For more details, see: https://comsec.ethz.ch/retbleed ETH Zurich have allocated CVE-2022-29900 for AMD and CVE-2022-29901 for Intel. Despite the similar...

Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-013)

The version of kernel installed on the remote host is prior to 5.4.50-25.83. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2022-013 advisory. A logic bug flaw was found in the Linux kernel's implementation of SSBD. A bug in the logic handling allows a...

New Exploit Bypasses Existing Spectre-V2 Mitigations in Intel, AMD, Arm CPUs

Researchers have disclosed a new technique that could be used to circumvent existing hardware mitigations in modern processors from Intel, AMD, and Arm, and stage speculative execution attacks such as Spectre to leak sensitive information from host memory. Attacks like Spectre are designed to bre...

CVE-2022-25368

Spectre BHB is a variant of Spectre-v2 in which malicious code uses the shared branch history stored in the CPU BHB to influence mispredicted branches in the victim's hardware context. Speculation caused by these mispredicted branches can then potentially be used to cause cache allocation, which...

Multiple speculative security issues

ISSUE DESCRIPTION Note: Multiple issues are contained in this XSA due to their interactions. 1 Researchers at VU Amsterdam have discovered Spectre-BHB, pertaining to the use of Branch History between privilege levels. ARM have assigned CVE-2022-23960. Intel have assigned CVE-2022-0001 Branch...

Unbreakable Enterprise kernel security update

4.14.35-2047.511.5.4 - x86/speculation: Add knob for eibrsretpolineenabled Patrick Colp Orabug: 33922122 CVE-2021-26341 - x86/speculation: Extend our code to properly support eibrs+lfence and eibrs+retpoline Patrick Colp Orabug: 33922122 CVE-2021-26341 - x86/speculation: Update link to AMD...

Unbreakable Enterprise kernel-container security update

4.14.35-2047.511.5.4.el7 - x86/speculation: Add knob for eibrsretpolineenabled Patrick Colp Orabug: 33922122 CVE-2021-26341 - x86/speculation: Extend our code to properly support eibrs+lfence and eibrs+retpoline Patrick Colp Orabug: 33922122 CVE-2021-26341 - x86/speculation: Update link to AMD...

Mageia: Security Advisory (MGASA-2018-0487)

The remote host is missing an update for the SPDX-FileCopyrightText: 2022 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

kconfig-hardened-check-master

This is a tool for checking Linux kernel Kconfig option lists against security hardening preferences. The tool is called "kconfig-hardened-check" and is written in Python. It is designed to help users ensure that their Linux systems are properly secured by checking the kernel configuration agains...

ASB-A-169505929

In ibprctlset of bugs.c, there is a possible way to re-enable indirect branch speculation due to a permissions bypass. This could lead to local information disclosure via a Spectre v2 attack with no additional execution privileges needed. User interaction is not needed for exploitation...

CVE-2021-28689

x86: Speculative vulnerabilities with bare non-shim 32-bit PV guests 32-bit x86 PV guest kernels run in ring 1. At the time when Xen was developed, this area of the i386 architecture was rarely used, which is why Xen was able to use it to implement paravirtualisation, Xen's novel approach to...