CVE-2025-39718 (GCVE-0-2025-39718)

Vulnerability from cvelistv5 – Published: 2025-09-05 17:21 – Updated: 2026-05-23 16:00
VLAI?
Title
vsock/virtio: Validate length in packet header before skb_put()
Summary
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().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: baddcc2c71572968cdaeee1c4ab3dc0ad90fa765 , < 969b06bd8b7560efb100a34227619e7d318fbe05 (git)
Affected: 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 , < ee438c492b2e0705d819ac0e25d04fae758d8f8f (git)
Affected: 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 , < faf332a10372390ce65d0b803888f4b25a388335 (git)
Affected: 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 , < 676f03760ca1d69c2470cef36c44dc152494b47c (git)
Affected: 71dc9ec9ac7d3eee785cdc986c3daeb821381e20 , < 0dab92484474587b82e8e0455839eaf5ac7bf894 (git)
Affected: 6.1.63 , < 6.1.149 (semver)
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Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.1.149 , ≤ 6.1.* (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.44 , ≤ 6.12.* (semver)
Unaffected: 6.16.4 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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