In the Linux kernel, the following vulnerability has been resolved:
virtio-pci: Fix result size returned for the admin command completion
The result size returned by virtio_pci_admin_dev_parts_get() is 8 bytes
larger than the actual result data size. This occurs because the
result_sg_size field of the command is filled with the result length
from virtqueue_get_buf(), which includes both the data size and an
additional 8 bytes of status.
This oversized result size causes two issues:
1. The state transferred to the destination includes 8 bytes of extra
data at the end.
2. The allocated buffer in the kernel may be smaller than the returned
size, leading to failures when reading beyond the allocated size.
The commit fixes this by subtracting the status size from the result of
virtqueue_get_buf().
This fix has been tested through live migrations with virtio-net,
virtio-net-transitional, and virtio-blk devices.
Metrics
Affected Vendors & Products
References
History
Thu, 10 Jul 2025 08:00:00 +0000
Type | Values Removed | Values Added |
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Description | In the Linux kernel, the following vulnerability has been resolved: virtio-pci: Fix result size returned for the admin command completion The result size returned by virtio_pci_admin_dev_parts_get() is 8 bytes larger than the actual result data size. This occurs because the result_sg_size field of the command is filled with the result length from virtqueue_get_buf(), which includes both the data size and an additional 8 bytes of status. This oversized result size causes two issues: 1. The state transferred to the destination includes 8 bytes of extra data at the end. 2. The allocated buffer in the kernel may be smaller than the returned size, leading to failures when reading beyond the allocated size. The commit fixes this by subtracting the status size from the result of virtqueue_get_buf(). This fix has been tested through live migrations with virtio-net, virtio-net-transitional, and virtio-blk devices. | |
Title | virtio-pci: Fix result size returned for the admin command completion | |
References |
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Status: PUBLISHED
Assigner: Linux
Published: 2025-07-10T07:42:21.937Z
Updated: 2025-07-10T07:42:21.937Z
Reserved: 2025-04-16T04:51:24.003Z
Link: CVE-2025-38314

No data.

Status : Awaiting Analysis
Published: 2025-07-10T08:15:30.363
Modified: 2025-07-10T13:17:30.017
Link: CVE-2025-38314

No data.