CVE-2021-46967 (GCVE-0-2021-46967)
Vulnerability from cvelistv5
Published
2024-02-27 18:47
Modified
2025-05-04 07:01
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9
Version: ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9
Version: ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9
Version: ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9
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