# CVE-2021-47024: linux: In the Linux kernel, the following vulnerability has been resolved:  vsock/virtio: free queued packets when closing s...

CVE-2021-47024 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47024, released February 28, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47024
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 28, 2024

## 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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.10.38-1 | [DEBIAN-CVE-2021-47024](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47024.md) | Feb 28, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.10.38-1 | [DEBIAN-CVE-2021-47024](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47024.md) | Feb 28, 2024 |
| Linux | linux Debian 14 | 5.10.38-1 | [DEBIAN-CVE-2021-47024](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47024.md) | Feb 28, 2024 |

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