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CVE-2025-21669

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 o…

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 5.5 before 5.15.177
from 5.16 before 6.1.127
from 6.2 before 6.6.74
from 6.7 before 6.12.11
Version 6.13

Weakness classification

CWE-476

References