# CVE-2022-50345: linux: In the Linux kernel, the following vulnerability has been resolved:  NFSD: Protect against send buffer overflow in NF...

CVE-2022-50345 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50345, released September 16, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-50345
- Priority: Routine
- CVSS: n/a
- EPSS: n/a
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  NFSD: Protect against send buffer overflow in NFSv3 READ  Since before the git era, NFSD has conserved the number of pages held by each nfsd thread by combining the RPC receive and send buffers into a single array of pages. This works because there are no cases where an operation needs a large RPC Call message and a large RPC Reply at the same time.  Once an RPC Call has been received, svc_process() updates svc_rqst::rq_res to describe the part of rq_pages that can be used for constructing the Reply. This means that the send buffer (rq_res) shrinks when the received RPC record containing the RPC Call is large.  A client can force this shrinkage on TCP by sending a correctly- formed RPC Call header contained in an RPC record that is excessively large. The full maximum payload size cannot be constructed in that case.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 11.6 (bullseye) | 5.10.221-1 | [DEBIAN-CVE-2022-50345](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50345.md) | Sep 16, 2025 |
| Linux | linux Debian 12.15 (bookworm) | 6.0.3-1 | [DEBIAN-CVE-2022-50345](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50345.md) | Sep 16, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.3-1 | [DEBIAN-CVE-2022-50345](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50345.md) | Sep 16, 2025 |
| Linux | linux Debian 14 | 6.0.3-1 | [DEBIAN-CVE-2022-50345](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50345.md) | Sep 16, 2025 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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