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CVE-2026-21371 (GCVE-0-2026-21371)

Vulnerability from cvelistv5 – Published: 2026-04-06 15:33 – Updated: 2026-04-07 03:55
VLAI
Title
Buffer Over-read in WinBlast Driver
Summary
Memory Corruption when retrieving output buffer with insufficient size validation.
Severity
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-04-06 00:00 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Qualcomm, Inc. Snapdragon Affected: AQT1000
Affected: Cologne
Affected: FastConnect 6200
Affected: FastConnect 6700
Affected: FastConnect 6800
Affected: FastConnect 6900
Affected: FastConnect 7800
Affected: QCA0000
Affected: QCA6391
Affected: QCA6420
Affected: QCA6430
Affected: QCM5430
Affected: QCM6490
Affected: Qualcomm Video Collaboration VC3 Platform
Affected: SC8380XP
Affected: SM6250
Affected: Snapdragon 460 Mobile Platform
Affected: Snapdragon 662 Mobile Platform
Affected: Snapdragon 7c Compute Platform
Affected: Snapdragon 7c Gen 2 Compute Platform "Rennell Pro"
Affected: Snapdragon 7c+ Gen 3 Compute
Affected: Snapdragon 8c Compute Platform "Poipu Lite"
Affected: Snapdragon 8c Compute Platform (SC8180XP-AD) "Poipu Lite"
Affected: Snapdragon 8cx Compute Platform
Affected: Snapdragon 8cx Compute Platform "Poipu Pro"
Affected: Snapdragon 8cx Gen 2 5G Compute Platform
Affected: Snapdragon 8cx Gen 2 5G Compute Platform "Poipu Pro"
Affected: Snapdragon 8cx Gen 3 Compute Platform
Affected: WCD9340
Affected: WCD9341
Affected: WCD9370
Affected: WCD9375
Affected: WCD9378C
Affected: WCD9380
Affected: WCD9385
Affected: WCN3950
Affected: WCN3988
Affected: WSA8810
Affected: WSA8815
Affected: WSA8830
Affected: WSA8835
Affected: WSA8840
Affected: WSA8845
Affected: WSA8845H
Affected: X2000077
Affected: X2000086
Affected: X2000090
Affected: X2000092
Affected: X2000094
Affected: XG101002
Affected: XG101032
Affected: XG101039
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    "redhat_vex": {
      "current_release_date": "2026-04-07T17:03:43+00:00",
      "cve": "CVE-2026-21371",
      "id": "CVE-2026-21371",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Buffer Over-read in WinBlast Driver",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21371.json",
      "version": "3"
    },
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Compute Platform\"}, {\"status\": \"affected\", \"version\": \"Snapdragon 8cx Gen 2 5G Compute Platform \\\"Poipu Pro\\\"\"}, {\"status\": \"affected\", \"version\": \"Snapdragon 8cx Gen 3 Compute Platform\"}, {\"status\": \"affected\", \"version\": \"WCD9340\"}, {\"status\": \"affected\", \"version\": \"WCD9341\"}, {\"status\": \"affected\", \"version\": \"WCD9370\"}, {\"status\": \"affected\", \"version\": \"WCD9375\"}, {\"status\": \"affected\", \"version\": \"WCD9378C\"}, {\"status\": \"affected\", \"version\": \"WCD9380\"}, {\"status\": \"affected\", \"version\": \"WCD9385\"}, {\"status\": \"affected\", \"version\": \"WCN3950\"}, {\"status\": \"affected\", \"version\": \"WCN3988\"}, {\"status\": \"affected\", \"version\": \"WSA8810\"}, {\"status\": \"affected\", \"version\": \"WSA8815\"}, {\"status\": \"affected\", \"version\": \"WSA8830\"}, {\"status\": \"affected\", \"version\": \"WSA8835\"}, {\"status\": \"affected\", \"version\": \"WSA8840\"}, {\"status\": \"affected\", \"version\": \"WSA8845\"}, {\"status\": \"affected\", \"version\": \"WSA8845H\"}, {\"status\": \"affected\", \"version\": \"X2000077\"}, {\"status\": \"affected\", \"version\": \"X2000086\"}, {\"status\": \"affected\", \"version\": \"X2000090\"}, {\"status\": \"affected\", \"version\": \"X2000092\"}, {\"status\": \"affected\", \"version\": \"X2000094\"}, {\"status\": \"affected\", \"version\": \"XG101002\"}, {\"status\": \"affected\", \"version\": \"XG101032\"}, {\"status\": \"affected\", \"version\": \"XG101039\"}], \"platforms\": [\"Snapdragon Compute\", \"Snapdragon Industrial IOT\", \"Snapdragon Mobile\"], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Memory Corruption when retrieving output buffer with insufficient size validation.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-126\", \"description\": \"CWE-126 Buffer Over-read\"}]}], \"providerMetadata\": {\"orgId\": \"2cfc7d3e-20d3-47ac-8db7-1b7285aff15f\", \"shortName\": \"qualcomm\", \"dateUpdated\": \"2026-04-06T15:33:47.240Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-21371\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-07T03:55:48.143Z\", \"dateReserved\": \"2025-12-17T04:35:45.742Z\", \"assignerOrgId\": \"2cfc7d3e-20d3-47ac-8db7-1b7285aff15f\", \"datePublished\": \"2026-04-06T15:33:47.240Z\", \"assignerShortName\": \"qualcomm\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.