CVE-2025-39718

MEDIUM EPSS 3.5%
Published Sep 5, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 5, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

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().

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥6.1.63  –  <6.1.149
linuxlinux_kernel*≥6.3  –  <6.6.103
linuxlinux_kernel*≥6.7  –  <6.12.44
linuxlinux_kernel*≥6.13  –  <6.16.4
debiandebian_linux11.0any

References 7

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-032379.html
  • git.kernel.org https://git.kernel.org/stable/c/0dab92484474587b82e8e0455839eaf5ac7bf894
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/676f03760ca1d69c2470cef36c44dc152494b47c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/969b06bd8b7560efb100a34227619e7d318fbe05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ee438c492b2e0705d819ac0e25d04fae758d8f8f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/faf332a10372390ce65d0b803888f4b25a388335
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0dab92484474587b82e8e0455839eaf5ac7bf894
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/676f03760ca1d69c2470cef36c44dc152494b47c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/969b06bd8b7560efb100a34227619e7d318fbe05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ee438c492b2e0705d819ac0e25d04fae758d8f8f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/faf332a10372390ce65d0b803888f4b25a388335
    Patch