Riskcovery

CVE-2021-47024

vsock/virtio: free queued packets when closing socket

State
Published
Severity
Not scored
Published
Feb 28, 2024
Updated
May 23, 2026
Reserved
Feb 27, 2024

Read the record on cve.org

Description

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

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • ac03046ece2b158ebd204dfc4896fd9f39f0e6c8 to before b605673b523fe33abeafb2136759bcbc9c1e6ebfAffected
  • ac03046ece2b158ebd204dfc4896fd9f39f0e6c8 to before 27691665145e74a45034a9dccf1150cf1894763aAffected
  • ac03046ece2b158ebd204dfc4896fd9f39f0e6c8 to before 37c38674ef2f8d7e8629e5d433c37d6c1273d16bAffected
  • ac03046ece2b158ebd204dfc4896fd9f39f0e6c8 to before 8432b8114957235f42e070a16118a7f750de9d39Affected
  • 4ea082cd3c400cd5bb36a7beb7e441bf3e29350dAffected
  • 4e539fa2dec4db3405e47002f2878aa4a99eb68bAffected
  • 4af8a327aeba102aaa9b78f3451f725bc590b237Affected
  • 51adb8ebe8c1d80528fc2ea863cfea9d32d2c52bAffected
  • 7d29c9ad0ed525c1b10e29cfca4fb1eece1e93fbAffected
  • 4.9.179 to before 4.10Affected
  • 4.14.122 to before 4.15Affected
  • 4.19.46 to before 4.20Affected
  • 5.0.19 to before 5.1Affected
  • 5.1.5 to before 5.2Affected
LinuxLinux
  • 5.2Affected
  • before 5.2Not affected
  • 5.10.37 through 5.10.*Not affected
  • 5.11.21 through 5.11.*Not affected
  • 5.12.4 through 5.12.*Not affected
  • 5.13 and laterNot affected

References

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