vulnerability

Amazon Linux 2023: CVE-2025-39718: Important priority package update for kernel (Multiple Advisories)

Severity
7
CVSS
(AV:A/AC:L/Au:N/C:P/I:P/A:C)
Published
Sep 5, 2025
Added
Sep 30, 2025
Modified
Oct 16, 2025

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().

Solutions

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