CVE-2021-46967

01/תיאור (מקור, אנגלית)

In the Linux kernel, the following vulnerability has been resolved: vhost-vdpa: fix vm_flags for virtqueue doorbell mapping The virtqueue doorbell is usually implemented via registeres but we don't provide the necessary vma->flags like VM_PFNMAP. This may cause several issues e.g when userspace tries to map the doorbell via vhost IOTLB, kernel may panic due to the page is not backed by page structure. This patch fixes this by setting the necessary vm_flags. With this patch, try to map doorbell via IOTLB will fail with bad address.

02/מוצרים מושפעים

linux: linux kernel

03/קישורים8

• git.kernel.org/stable/c/3a3e0fad16d40a2aa68ddf7eea4acdf48b22dd44 Patch
• git.kernel.org/stable/c/3b8b6399666a29daa30b0bb3f5c9e3fc81c5a6a6 Patch
• git.kernel.org/stable/c/93dbbf20e3ffad14f04227a0b7105f6e6f0387ce Patch
• git.kernel.org/stable/c/940230a5c31e2714722aee04c521a21f484b4df7 Patch
• git.kernel.org/stable/c/3a3e0fad16d40a2aa68ddf7eea4acdf48b22dd44 Patch
• git.kernel.org/stable/c/3b8b6399666a29daa30b0bb3f5c9e3fc81c5a6a6 Patch
• git.kernel.org/stable/c/93dbbf20e3ffad14f04227a0b7105f6e6f0387ce Patch
• git.kernel.org/stable/c/940230a5c31e2714722aee04c521a21f484b4df7 Patch