vulnerability
Red Hat: CVE-2025-39718: kernel: vsock/virtio: Validate length in packet header before skb_put() (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:A/AC:L/Au:N/C:P/I:P/A:C) | Sep 5, 2025 | Oct 28, 2025 | Nov 18, 2025 |
Severity
7
CVSS
(AV:A/AC:L/Au:N/C:P/I:P/A:C)
Published
Sep 5, 2025
Added
Oct 28, 2025
Modified
Nov 18, 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
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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