USN-5265-1: Linux kernel vulnerabilities

Jeremy Cline discovered a use-after-free in the nouveau graphics driver of the Linux kernel during device removal. A privileged or physically proximate attacker could use this to cause a denial of service system crash. CVE-2020-27820 It was discovered that the Bluetooth subsystem in the Linux...

Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-5265-1)

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5265-1 advisory. Jeremy Cline discovered a use-after-free in the nouveau graphics driver of the Linux kernel during device removal. A privileged or physically proximate...

Mageia: Security Advisory (MGASA-2019-0207)

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...

USN-5210-2: Linux kernel regression

USN-5210-1 fixed vulnerabilities in the Linux kernel. Unfortunately, that update introduced a regression that caused failures to boot in environments with AMD Secure Encrypted Virtualization SEV enabled. This update fixes the problem. We apologize for the inconvenience. Original advisory details:...

CVE-2021-4093

A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State SEV-ES. A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction for example, outs or ins using the exit...

Code injection

A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside Buffer TLB resulting in unexpected behavior inside the virtual machine VM...

CVE-2021-26340

A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside Buffer TLB resulting in unexpected behavior inside the virtual machine VM...

CVE-2021-26340

CVE-2021-26340 is a published vulnerability affecting AMD SEV/SEV-ES environments. A malicious hypervisor with an unprivileged attacker process inside a guest VM may fail to flush the TLB, causing unexpected VM behavior and potential loss of integrity and confidentiality. Affected products includ...

CVE-2021-4093

A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State SEV-ES. A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction for example, outs or ins using the exit...

CVE-2021-26321

Insufficient ID command validation in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP...

CVE-2021-26323

Failure to validate SEV Commands while SNP is active may result in a potential impact to memory integrity...

CVE-2021-26321

Insufficient ID command validation in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP...

CVE-2021-26323

Failure to validate SEV Commands while SNP is active may result in a potential impact to memory integrity...

CVE-2021-26320

Insufficient validation of the AMD SEV Signing Key ASK in the SENDSTART command in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP...

Command injection

Insufficient ID command validation in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP...

Authorization

Failure to validate SEV Commands while SNP is active may result in a potential impact to memory integrity...

Input validation

Insufficient validation of the AMD SEV Signing Key ASK in the SENDSTART command in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP...

CVE-2021-26323

CVE-2021-26323 relates to an input validation failure in AMD SNP/SEV handling. The issue is described as: failure to validate SEV Commands while SNP is active may impact memory integrity. Affected technology includes AMD Secure Processor components with SEV/SNP, impacting memory integrity (CVE se...

CVE-2021-26323

Failure to validate SEV Commands while SNP is active may result in a potential impact to memory integrity...

CVE-2021-26321

CVE-2021-26321 corresponds to an insufficient ID command validation in the AMD SEV Firmware that can allow a local authenticated attacker to cause a denial of service of the Platform Security Processor (PSP). The vulnerability affects AMD EPYC platforms (1st–3rd Gen) with SEV/ASP components; the ...