CVE-2021-26406

Insufficient validation in parsing Owner's Certificate Authority OCA certificates in SEV AMD Secure Encrypted Virtualization and SEV-ES user application can lead to a host crash potentially resulting in denial of service...

Moderate: Red Hat Security Advisory: qemu-kvm security, bug fix, and enhancement update

An update for qemu-kvm is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from t...

kernel: KVM: x86/xen: Initialize Xen timer only once

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/xen: Initialize Xen timer only once Add a check for existing xen timers before initializing a new one. Currently kvmxeninittimer is called on every KVMXENVCPUATTRTYPETIMER, which is causing the following ODEBUG crash whe...

kernel: crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak For some sev ioctl interfaces, input may be passed that is less than or equal to SEVFWBLOBMAXSIZE, but larger than the data that PSP firmware return...

kernel: KVM: nVMX: missing IBPB when exiting from nested guest can lead to Spectre v2 attacks

A flaw was found in the KVM's Intel nested virtualization feature nVMX. Since L1 and L2 shared branch prediction modes guest-user and guest-kernel, KVM did not protect indirect branches in L1 from steering by a malicious agent in L2. This could allow a malicious nested guest to carry out Spectre ...

kernel: Linux kernel KVM: Denial of Service via incorrect NX bit handling in NPT

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM component. When KVM uses Nested Page Tables NPT with NX huge page mitigation enabled, it incorrectly handles the No-Execute NX bit in Shadow Page Table Entries SPTE. This improper handling can be triggered by a local attacker...

kernel: KVM: NULL pointer dereference in kvm_mmu_invpcid_gva

A flaw was found in KVM. With shadow paging enabled if INVPCID is executed with CR0.PG=0, the invlpg callback is not set, and the result is a NULL pointer dereference. This flaw allows a guest user to cause a kernel oops condition on the host, resulting in a denial of service...

kernel: KVM: nVMX: missing IBPB when exiting from nested guest can lead to Spectre v2 attacks

A flaw was found in the KVM's Intel nested virtualization feature nVMX. Since L1 and L2 shared branch prediction modes guest-user and guest-kernel, KVM did not protect indirect branches in L1 from steering by a malicious agent in L2. This could allow a malicious nested guest to carry out Spectre ...

AMD Secure Encrypted Virtualization 安全漏洞

AMD Secure Encrypted Virtualization is a software application from UltraMicroelectronics AMD. Hardware-accelerated memory encryption to protect data in use. A security vulnerability exists in AMD Secure Encrypted Virtualization. An attacker could exploit this vulnerability to cause a denial of...

ALSA-2023:2162 Moderate: qemu-kvm security, bug fix, and enhancement update

Kernel-based Virtual Machine KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. The following packages have been upgraded to a later upstream version: qemu-kvm 7.2.0...

PT-2023-12100 · Amd · Amd Secure Encrypted Virtualization +1

Name of the Vulnerable Software and Affected Versions: AMD Secure Encrypted Virtualization SEV and SEV-ES affected versions not specified Description: The issue is related to insufficient validation in parsing Owner's Certificate Authority OCA certificates, which can lead to a host crash and...

Huawei EulerOS: Security Advisory for wayland (EulerOS-SA-2023-1710)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2023 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...

Huawei EulerOS: Security Advisory for gnupg2 (EulerOS-SA-2023-1751)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2023 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...

Fedora: Security Advisory for libkrun (FEDORA-2023-cc21019773)

The remote host is missing an update for the SPDX-FileCopyrightText: 2023 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...

[SECURITY] Fedora 38 Update: libkrun-1.5.0-2.fc38

Dynamic library providing Virtualization-based process isolation capabilities...

EulerOS Virtualization 3.0.2.0 : xz (EulerOS-SA-2023-1739)

According to the versions of the xz packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - An arbitrary file write vulnerability was found in GNU gzip's zgrep utility. When zgrep is applied on the attacker's chosen file name...

EulerOS Virtualization 3.0.2.0 : ncurses (EulerOS-SA-2023-1712)

According to the versions of the ncurses packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - ncurses 6.3 before patch 20220416 has an out-of-bounds read and segmentation violation in convertstrings in tinfo/readentry.c in...

EulerOS Virtualization 3.0.2.0 : yajl (EulerOS-SA-2023-1726)

According to the versions of the yajl package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - yajl-ruby is a C binding to the YAJL JSON parsing and generation library. The 1.x branch and the 2.x branch of yajl contain an integ...

EulerOS Virtualization 3.0.2.0 : gnupg2 (EulerOS-SA-2023-1751)

According to the versions of the gnupg2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - GnuPG through 2.3.6, in unusual situations where an attacker possesses any secret-key information from a victim's keyring and othe...

EulerOS Virtualization 3.0.2.0 : expat (EulerOS-SA-2023-1707)

According to the versions of the expat packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - xmltokimpl.c in Expat aka libexpat before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character...