CVE-2021-47024
Assigner: Linux
Published: 2024-02-28T08:13:36.489Z
State: PUBLISHED
descriptions: value: In the Linux kernel, the following vulnerability has been resolved:

vsock/virtio: free queued packets when closing socket

As reported by syzbot [1], there is a memory leak while closing the
socket. We partially solved this issue with commit ac03046ece2b
("vsock/virtio: free packets during the socket release"), but we
forgot to drain the RX queue when the socket is definitely closed by
the scheduled work.

To avoid future issues, let's use the new virtio_transport_remove_sock()
to drain the RX queue before removing the socket from the af_vsock lists
calling vsock_remove_sock().

[1] https://syzkaller.appspot.com/bug?extid=24452624fc4c571eedd9
affected: product: Linux
vendor: Linux
defaultStatus: unaffected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions: version: ac03046ece2b
lessThan: b605673b523f
status: affected
versionType: git
version: ac03046ece2b
lessThan: 27691665145e
status: affected
versionType: git
version: ac03046ece2b
lessThan: 37c38674ef2f
status: affected
versionType: git
version: ac03046ece2b
lessThan: 8432b8114957
status: affected
versionType: git
product: Linux
vendor: Linux
defaultStatus: affected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions: version: 5.2
status: affected
version: 0
lessThan: 5.2
status: unaffected
versionType: custom
version: 5.10.37
lessThanOrEqual: 5.10.*
status: unaffected
versionType: custom
version: 5.11.21
lessThanOrEqual: 5.11.*
status: unaffected
versionType: custom
version: 5.12.4
lessThanOrEqual: 5.12.*
status: unaffected
versionType: custom
version: 5.13
lessThanOrEqual: *
status: unaffected
versionType: original_commit_for_fix
title: vsock/virtio: free queued packets when closing socket
x_generator: engine: bippy-c298863b1525