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Vulnerabilities CVE-2025-21669

CVE-2025-21669

High
Open
TLP:CLEAR

vsock/virtio: discard packets if the transport changes

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Description

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: discard packets if the transport changes If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected and would cause issues when we access vsk->transport. A possible scenario is described by Hyunwoo Kim in the attached link, where after a first connect() interrupted by a signal, and a second connect() failed, we can find `vsk->transport` at NULL, leading to a NULL pointer dereference.

Details

CVSS Score
7.8
EPSS Score
0.23%

13.4th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
Jan 31, 2025
Last Modified
Aug 5, 2026
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