CVE-2025-39718
vsock/virtio: Validate length in packet header before skb_put()
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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().
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/0dab92484474587b82e8e0455839eaf5ac7bf894
- https://git.kernel.org/stable/c/676f03760ca1d69c2470cef36c44dc152494b47c
- https://git.kernel.org/stable/c/969b06bd8b7560efb100a34227619e7d318fbe05
- https://git.kernel.org/stable/c/ee438c492b2e0705d819ac0e25d04fae758d8f8f
- https://git.kernel.org/stable/c/faf332a10372390ce65d0b803888f4b25a388335
References (7)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Quick Info
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