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Medium severity5.5NVD Advisory· Published Sep 5, 2025· Updated May 12, 2026

CVE-2025-39718

CVE-2025-39718

Description

In the Linux kernel, the following vulnerability has been resolved:

vsock/virtio: Validate length in packet header before skb_put()

When receiving a vsock packet in the guest, only the virtqueue buffer size is validated prior to virtio_vsock_skb_rx_put(). Unfortunately, virtio_vsock_skb_rx_put() uses the length from the packet header as the length argument to skb_put(), potentially resulting in SKB overflow if the host has gone wonky.

Validate the length as advertised by the packet header before calling virtio_vsock_skb_rx_put().

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Affected products

153

Patches

Vulnerability mechanics

References

7

News mentions

1