CVE-2024-41011

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amdkfd: no permite mapear la página MMIO HDP con páginas grandes. En ese caso, no obtenemos el desplazamiento correcto. La GPU tiene un área 4K no utilizada del espacio BAR de registros en el que puede reasignar registros. Reasignamos los registros de descarga del HDP en este espacio para permitir que el espacio de usuario (CPU o GPU) vacíe el HDP cuando actualice la VRAM. Sin embargo, en sistemas con páginas >4K, terminamos exponiendo PAGE_SIZE del espacio MMIO.

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: don't allow mapping the MMIO HDP page with large pages We don't get the right offset in that case. The GPU has an unused 4K area of the register BAR space into which you can remap registers. We remap the HDP flush registers into this space to allow userspace (CPU or GPU) to flush the HDP when it updates VRAM. However, on systems with >4K pages, we end up exposing PAGE_SIZE of MMIO space.

It was discovered that the CIFS network file system implementation in the Linux kernel did not properly validate certain SMB messages, leading to an out-of-bounds read vulnerability. An attacker could use this to cause a denial of service or possibly expose sensitive information. Supraja Sridhara, Benedict Schlüter, Mark Kuhne, Andrin Bertschi, and Shweta Shinde discovered that the Confidential Computing framework in the Linux kernel for x86 platforms did not properly handle 32-bit emulation on TDX and SEV. An attacker with access to the VMM could use this to cause a denial of service or possibly execute arbitrary code.