CVE-2025-21669 - CVE House
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Status published Unknown CVE-2025-21669

vsock/virtio: discard packets if the transport changes

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a, 5.5, 0, 5.10.234, 5.15.177, 6.1.127, 6.6.74, 6.12.11, 6.13

Timeline

Official Publish: January 31st, 2025
Last Modified: May 12th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.