CVE-2022-50410 (GCVE-0-2022-50410)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:03 – Updated: 2026-08-05 08:58
VLAI
Title
NFSD: Protect against send buffer overflow in NFSv2 READ
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4452435948424e5322c2a2fefbdc2cf3732cc45d , < 2007867c5874134f2271eb276398208070049dd3 (git)
Affected: 4452435948424e5322c2a2fefbdc2cf3732cc45d , < 2be9331ca6061bc6ea32247266f45b8b21030244 (git)
Affected: 4452435948424e5322c2a2fefbdc2cf3732cc45d , < ea4c3eee0fd72fcedaa238556044825639cd3607 (git)
Affected: 4452435948424e5322c2a2fefbdc2cf3732cc45d , < 1868332032eccbab8c1878a0d918193058c0a905 (git)
Affected: 4452435948424e5322c2a2fefbdc2cf3732cc45d , < 401bc1f90874280a80b93f23be33a0e7e2d1f912 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.19
Unaffected: 0 , < 2.6.19 (semver)
Unaffected: 5.10.220 , ≤ 5.10.* (semver)
Unaffected: 5.15.75 , ≤ 5.15.* (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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This means that the send buffer\\n(rq_res) shrinks when the received RPC record containing the RPC\\nCall is large.\\n\\nA client can force this shrinkage on TCP by sending a correctly-\\nformed RPC Call header contained in an RPC record that is\\nexcessively large. 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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: NFSD: Protect against send buffer overflow in NFSv2 READ",
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    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-50410\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T19:08:41.494255Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787 Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T19:08:36.168Z\"}}], \"cna\": {\"title\": \"NFSD: Protect against send buffer overflow in NFSv2 READ\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4452435948424e5322c2a2fefbdc2cf3732cc45d\", \"lessThan\": \"2007867c5874134f2271eb276398208070049dd3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4452435948424e5322c2a2fefbdc2cf3732cc45d\", \"lessThan\": \"2be9331ca6061bc6ea32247266f45b8b21030244\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4452435948424e5322c2a2fefbdc2cf3732cc45d\", \"lessThan\": \"ea4c3eee0fd72fcedaa238556044825639cd3607\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4452435948424e5322c2a2fefbdc2cf3732cc45d\", \"lessThan\": \"1868332032eccbab8c1878a0d918193058c0a905\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4452435948424e5322c2a2fefbdc2cf3732cc45d\", \"lessThan\": \"401bc1f90874280a80b93f23be33a0e7e2d1f912\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/nfsd/nfsproc.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.19\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.19\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.220\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.75\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.19.17\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.19.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/nfsd/nfsproc.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2007867c5874134f2271eb276398208070049dd3\"}, {\"url\": \"https://git.kernel.org/stable/c/2be9331ca6061bc6ea32247266f45b8b21030244\"}, {\"url\": \"https://git.kernel.org/stable/c/ea4c3eee0fd72fcedaa238556044825639cd3607\"}, {\"url\": \"https://git.kernel.org/stable/c/1868332032eccbab8c1878a0d918193058c0a905\"}, {\"url\": \"https://git.kernel.org/stable/c/401bc1f90874280a80b93f23be33a0e7e2d1f912\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nNFSD: Protect against send buffer overflow in NFSv2 READ\\n\\nSince before the git era, NFSD has conserved the number of pages\\nheld by each nfsd thread by combining the RPC receive and send\\nbuffers into a single array of pages. This works because there are\\nno cases where an operation needs a large RPC Call message and a\\nlarge RPC Reply at the same time.\\n\\nOnce an RPC Call has been received, svc_process() updates\\nsvc_rqst::rq_res to describe the part of rq_pages that can be\\nused for constructing the Reply. This means that the send buffer\\n(rq_res) shrinks when the received RPC record containing the RPC\\nCall is large.\\n\\nA client can force this shrinkage on TCP by sending a correctly-\\nformed RPC Call header contained in an RPC record that is\\nexcessively large. The full maximum payload size cannot be\\nconstructed in that case.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.220\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.75\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19.17\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.3\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"2.6.19\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:18:57.302Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-50410\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:18:57.302Z\", \"dateReserved\": \"2025-09-17T14:53:07.002Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-18T16:03:54.612Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.