Deadlock in x86 HVM standard VGA handling

ISSUE DESCRIPTION The hypervisor contains code to accelerate VGA memory accesses for HVM guests, when the virtual VGA is in "standard" mode. Locking involved there has an unusual discipline, leaving a lock acquired past the return from the function that acquired it. This behavior results in a...

PT-2024-10468

Name of the Vulnerable Software and Affected Versions Xen hypervisor versions prior to 4.7 Description The issue is related to the hypervisor's code for accelerating VGA memory accesses for HVM guests in "standard" mode. The locking mechanism involved has an unusual discipline, which can lead to ...

CVE-2024-46698

In the Linux kernel, the following vulnerability has been resolved: video/aperture: optionally match the device in sysfbdisable In apertureremoveconflictingpcidevices, we currently only call sysfbdisable on vga class devices. This leads to the following problem when the pimary device is not VGA...

UBUNTU-CVE-2024-46698

In the Linux kernel, the following vulnerability has been resolved: video/aperture: optionally match the device in sysfbdisable In apertureremoveconflictingpcidevices, we currently only call sysfbdisable on vga class devices. This leads to the following problem when the pimary device is not VGA...

CVE-2024-46698 video/aperture: optionally match the device in sysfb_disable()

In the Linux kernel, the following vulnerability has been resolved: video/aperture: optionally match the device in sysfbdisable In apertureremoveconflictingpcidevices, we currently only call sysfbdisable on vga class devices. This leads to the following problem when the pimary device is not VGA...

CVE-2024-46698 video/aperture: optionally match the device in sysfb_disable()

In the Linux kernel, the following vulnerability has been resolved: video/aperture: optionally match the device in sysfbdisable In apertureremoveconflictingpcidevices, we currently only call sysfbdisable on vga class devices. This leads to the following problem when the pimary device is not VGA...

Linux Kernel QXL VGA Driver Race Condition Local Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the QXL VGA driver. Th...

USN-6567-2 qemu regression

USN-6567-1 fixed vulnerabilities QEMU. The fix for CVE-2023-2861 was too restrictive and introduced a behaviour change leading to a regression in certain environments. This update fixes the problem. Original advisory details: Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the...

Ubuntu 20.04 LTS / 22.04 LTS : QEMU regression (USN-6567-2)

The remote Ubuntu 20.04 LTS / 22.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-6567-2 advisory. USN-6567-1 fixed vulnerabilities QEMU. The fix for CVE-2023-2861 was too restrictive and introduced a behaviour change leading to a regression in...

SUSE CVE-2020-14331

A flaw was found in the Linux kernel's implementation of the invert video code on VGA consoles when a local attacker attempts to resize the console, calling an ioctl VTRESIZE, which causes an out-of-bounds write to occur. This flaw allows a local user with access to the VGA console to crash the...

CVE-2024-35952

In the Linux kernel, the following vulnerability has been resolved: drm/ast: Fix soft lockup There is a while-loop in astdpsetonoff that could lead to infinite-loop. This is because the register, VGACRI-Dx, checked in this API is a scratch register actually controlled by a MCU, named DPMCU, in BM...

DEBIAN-CVE-2024-35952

In the Linux kernel, the following vulnerability has been resolved: drm/ast: Fix soft lockup There is a while-loop in astdpsetonoff that could lead to infinite-loop. This is because the register, VGACRI-Dx, checked in this API is a scratch register actually controlled by a MCU, named DPMCU, in BM...

CVE-2024-35952 drm/ast: Fix soft lockup

In the Linux kernel, the following vulnerability has been resolved: drm/ast: Fix soft lockup There is a while-loop in astdpsetonoff that could lead to infinite-loop. This is because the register, VGACRI-Dx, checked in this API is a scratch register actually controlled by a MCU, named DPMCU, in BM...

CVE-2024-35952 drm/ast: Fix soft lockup

In the Linux kernel, the following vulnerability has been resolved: drm/ast: Fix soft lockup There is a while-loop in astdpsetonoff that could lead to infinite-loop. This is because the register, VGACRI-Dx, checked in this API is a scratch register actually controlled by a MCU, named DPMCU, in BM...

RHEL 7 : qemu-kvm-rhev (RHSA-2018:1643)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:1643 advisory. KVM Kernel-based Virtual Machine is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provi...

RHEL 7 : qemu-kvm-rhev (RHSA-2018:1646)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:1646 advisory. KVM Kernel-based Virtual Machine is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provi...

SUSE SLES15: qemu-SLOF / qemu-accel-qtest / qemu-accel-tcg-x86 / qemu-arm / etc (SUSE-SU-2024:0589-1)

The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:0589-1 advisory. - CVE-2021-3638: hw/display/ati2d: Fix buffer overflow in ati2dblt bsc1188609 - CVE-2023-3180: virtio-crypto: verify src and dst buffer length...

Ubuntu: Security Advisory (USN-6567-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2024 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-6567-1: QEMU vulnerabilities

Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the USB xHCI controller device. A privileged guest attacker could possibly use this issue to cause QEMU to crash, leading to a denial of service. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. CVE-2020-14394 It w...

Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : QEMU vulnerabilities (USN-6567-1)

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6567-1 advisory. Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the USB xHCI controller device. A privileged guest attack...