Date: Tue, 19 May 2020 17:04:57 +0530 (IST) From: P J P <ppandit@...hat.com> To: oss security list <oss-security@...ts.openwall.com> Subject: CVE-2020-12888 Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario Hello, A flaw was found in the Linux kernel, where it allows userspace processes, for example, a guest VM, to directly access h/w devices via its VFIO driver modules. The VFIO modules allow users to enable or disable access to the devices' MMIO memory address spaces. If a user attempts to access (read/write) the devices' MMIO address space when it is disabled, some h/w devices issue an interrupt to the CPU to indicate a fatal error condition, crashing the system. This flaw allows a guest user or process to crash the host system resulting in a denial of service. Upstream patch: --------------- -> https://firstname.lastname@example.org/ -> https://email@example.com/ 'CVE-2020-12888' requested via https://cveform.mitre.org/ Thank you. -- Prasad J Pandit / Red Hat Product Security Team 8685 545E B54C 486B C6EB 271E E285 8B5A F050 DE8D
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