CVE-2025-39718

Advisory lineage Upstream: 0 Downstream: 45
Modified
Published: 05 Sept 2025, 17:21
Last modified:23 May 2026, 16:00

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.03% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

05 Sept 2025, 17:21
Published
Vulnerability first disclosed
23 May 2026, 16:00
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.03%• Percentile: 8%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ baddcc2c71572968cdaeee1c4ab3dc0ad90fa765, < 969b06bd8b7560efb100a34227619e7d318fbe05 | ≥ 71dc9ec9ac7d3eee785cdc986c3daeb821381e20, < ee438c492b2e0705d819ac0e25d04fae758d8f8f | ≥ 71dc9ec9ac7d3eee785cdc986c3daeb821381e20, < faf332a10372390ce65d0b803888f4b25a388335 | ≥ 71dc9ec9ac7d3eee785cdc986c3daeb821381e20, < 676f03760ca1d69c2470cef36c44dc152494b47c | ≥ 71dc9ec9ac7d3eee785cdc986c3daeb821381e20, < 0dab92484474587b82e8e0455839eaf5ac7bf894 | ≥ 6.1.63, < 6.1.149 | 6.3

  • linux•linux_kernel

    ≥ 6.1.63, < 6.1.149 | ≥ 6.3, < 6.6.103 | ≥ 6.7, < 6.12.44 | ≥ 6.13, < 6.16.4

References (7)