CVE-2021-47024
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.
Does this matter?
Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own.
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
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.25% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763aPatch
- https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16bPatch
- https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39Patch
- https://git.kernel.org/stable/c/b605673b523fe33abeafb2136759bcbc9c1e6ebfPatch
- https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763aPatch
- https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16bPatch
- https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39Patch
- https://git.kernel.org/stable/c/b605673b523fe33abeafb2136759bcbc9c1e6ebfPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.