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Review reviewHigh

CVE-2022-50410

Linux Linux, linux kernel

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...

CVSS
7.8
EPSS
0.40%
32.2% percentile
CISA KEV
Not listed
Published
2025.09.19
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.40%
Technical severityCVSS 7.8

Vulnerability overview

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...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 4452435948424e5322c2a2fefbdc2cf3732cc45d < 2007867c5874134f2271eb276398208070049dd3, >= 4452435948424e5322c2a2fefbdc2cf3732cc45d < 2be9331ca6061bc6ea32247266f45b8b21030244, >= 4452435948424e5322c2a2fefbdc2cf3732cc45d < ea4c3eee0fd72fcedaa238556044825639cd3607, >= 4452435948424e5322c2a2fefbdc2cf3732cc45d < 1868332032eccbab8c1878a0d918193058c0a905, >= 4452435948424e5322c2a2fefbdc2cf3732cc45d < 401bc1f90874280a80b93f23be33a0e7e2d1f912, >= 2.6.19, < 5.10.220, >= 5.11 < 5.15.75, >= 5.16 < 5.19.17, >= 6.0 < 6.0.3
Fixed versions
5.10.220, 5.15.75, 5.19.17, 6.0.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-787