CVE-2022-50410

In the Linux kernel, the following vulnerability has been resolved: NFSD: Protect against send buffer overflow in NFSv2 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.

• CWE-787
• CWE-787

• https://git.kernel.org/stable/c/1868332032eccbab8c1878a0d918193058c0a905Patch
• https://git.kernel.org/stable/c/2007867c5874134f2271eb276398208070049dd3Patch
• https://git.kernel.org/stable/c/2be9331ca6061bc6ea32247266f45b8b21030244Patch
• https://git.kernel.org/stable/c/401bc1f90874280a80b93f23be33a0e7e2d1f912Patch
• https://git.kernel.org/stable/c/ea4c3eee0fd72fcedaa238556044825639cd3607Patch

Published

Sep 18, 2025

Last Modified

Aug 4, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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