CVE-2025-21421

Memory corruption via Display API escape-code processing

Published Apr 7, 2025 · Updated Feb 26, 2026

Buffer over-read in the Display API in Qualcomm Snapdragon allows local users to corrupt memory through a crafted escape code. The public record identifies escape-code processing as the locus but does not disclose the affected function or the bounds-checking error that permits the over-read. Exploitation requires local low-privilege access without user interaction, but Qualcomm does not specify whether corruption causes a crash, code execution, or data disclosure.

CVSS severity7.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer over-read in the Display API in Qualcomm Snapdragon allows local users to corrupt memory through a crafted escape code. The public record identifies escape-code processing as the locus but does not disclose the affected function or the bounds-checking error that permits the over-read. Exploitation requires local low-privilege access without user interaction, but Qualcomm does not specify whether corruption causes a crash, code execution, or data disclosure.

The record

CVE
CVE-2025-21421
Published
Apr 7, 2025
Updated
Feb 26, 2026
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-126
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=AQT1000
  2. Affected versionversion=FastConnect 6200
  3. Affected versionversion=FastConnect 6700
  4. Affected versionversion=FastConnect 6800
  5. Affected versionversion=FastConnect 6900
  6. Affected versionversion=FastConnect 7800
  7. Affected versionversion=QCA6391
  8. Affected versionversion=QCA6420
  9. Affected versionversion=QCA6430
  10. Affected versionversion=QCM5430
  11. Affected versionversion=QCM6490
  12. Affected versionversion=QCS5430
  13. Affected versionversion=QCS6490
  14. Affected versionversion=Qualcomm Video Collaboration VC3 Platform
  15. Affected versionversion=SC8180X+SDX55
  16. Affected versionversion=SC8380XP
  17. Affected versionversion=SM6250
  18. Affected versionversion=Snapdragon 7c Compute Platform (SC7180-AC)
  19. Affected versionversion=Snapdragon 7c Gen 2 Compute Platform (SC7180-AD) "Rennell Pro"
  20. Affected versionversion=Snapdragon 7c+ Gen 3 Compute
  21. Affected versionversion=Snapdragon 8c Compute Platform (SC8180X-AD) "Poipu Lite"
  22. Affected versionversion=Snapdragon 8c Compute Platform (SC8180XP-AD) "Poipu Lite"
  23. Affected versionversion=Snapdragon 8cx Compute Platform (SC8180X-AA, AB)
  24. Affected versionversion=Snapdragon 8cx Compute Platform (SC8180XP-AC, AF) "Poipu Pro"
  25. Affected versionversion=Snapdragon 8cx Gen 2 5G Compute Platform (SC8180X-AC, AF) "Poipu Pro"
  26. Affected versionversion=Snapdragon 8cx Gen 2 5G Compute Platform (SC8180XP-AA, AB)
  27. Affected versionversion=Snapdragon 8cx Gen 3 Compute Platform (SC8280XP-AB, BB)
  28. Affected versionversion=WCD9340
  29. Affected versionversion=WCD9341
  30. Affected versionversion=WCD9370
  31. Affected versionversion=WCD9375
  32. Affected versionversion=WCD9380
  33. Affected versionversion=WCD9385
  34. Affected versionversion=WSA8810
  35. Affected versionversion=WSA8815
  36. Affected versionversion=WSA8830
  37. Affected versionversion=WSA8835
  38. Affected versionversion=WSA8840
  39. Affected versionversion=WSA8845
  40. Affected versionversion=WSA8845H

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Qualcomm · Snapdragonversion=AQT1000; version=FastConnect 6200; version=FastConnect 6700; version=FastConnect 6800; version=FastConnect 6900; version=FastConnect 7800; version=QCA6391; version=QCA6420; version=QCA6430; version=QCM5430; version=QCM6490; version=QCS5430; version=QCS6490; version=Qualcomm Video Collaboration VC3 Platform; version=SC8180X+SDX55; version=SC8380XP; version=SM6250; version=Snapdragon 7c Compute Platform (SC7180-AC); version=Snapdragon 7c Gen 2 Compute Platform (SC7180-AD) "Rennell Pro"; version=Snapdragon 7c+ Gen 3 Compute; version=Snapdragon 8c Compute Platform (SC8180X-AD) "Poipu Lite"; version=Snapdragon 8c Compute Platform (SC8180XP-AD) "Poipu Lite"; version=Snapdragon 8cx Compute Platform (SC8180X-AA, AB); version=Snapdragon 8cx Compute Platform (SC8180XP-AC, AF) "Poipu Pro"; version=Snapdragon 8cx Gen 2 5G Compute Platform (SC8180X-AC, AF) "Poipu Pro"; version=Snapdragon 8cx Gen 2 5G Compute Platform (SC8180XP-AA, AB); version=Snapdragon 8cx Gen 3 Compute Platform (SC8280XP-AB, BB); version=WCD9340; version=WCD9341; version=WCD9370; version=WCD9375; version=WCD9380; version=WCD9385; version=WSA8810; version=WSA8815; version=WSA8830; version=WSA8835; version=WSA8840; version=WSA8845; version=WSA8845H

Published CVSS scores

7.8Qualcomm, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-126Buffer Over-read

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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