# CVE-2022-48816: SUNRPC: lock against ->sock changing during sysfs read

CVE-2022-48816 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48816, released July 16, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48816
- Priority: Routine
- CVSS: 4.7 (Moderate)
- EPSS: 0.0029
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 16, 2024
- Weakness: NULL Pointer Dereference
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-48816

## Description

In the Linux kernel, the following vulnerability has been resolved:  SUNRPC: lock against ->sock changing during sysfs read  ->sock can be set to NULL asynchronously unless ->recv_mutex is held. So it is important to hold that mutex.  Otherwise a sysfs read can trigger an oops. Commit 17f09d3f619a ("SUNRPC: Check if the xprt is connected before handling sysfs reads") appears to attempt to fix this problem, but it only narrows the race window.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.16.10-1 | [DEBIAN-CVE-2022-48816](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48816.md) | Jul 16, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.16.10-1 | [DEBIAN-CVE-2022-48816](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48816.md) | Jul 16, 2024 |
| Linux | linux Debian 14 | 5.16.10-1 | [DEBIAN-CVE-2022-48816](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48816.md) | Jul 16, 2024 |

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