CVE-2023-33101Network attack vector

Modem service interruption via zero-length NAS payload

Published Apr 1, 2024 · Updated Aug 2, 2024

Denial of service in Qualcomm Snapdragon call processing allows remote attackers to interrupt modem service via a zero-length DL NAS TRANSPORT payload. The Multi-Mode Call Processor incorrectly converts or casts the payload-length value while parsing a DL NAS TRANSPORT message whose payload length is zero. No authentication or user interaction is required; the documented consequence is a transient service interruption rather than data access or modification.

CVSS severity7.5
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Qualcomm Snapdragon call processing allows remote attackers to interrupt modem service via a zero-length DL NAS TRANSPORT payload. The Multi-Mode Call Processor incorrectly converts or casts the payload-length value while parsing a DL NAS TRANSPORT message whose payload length is zero. No authentication or user interaction is required; the documented consequence is a transient service interruption rather than data access or modification.

The record

CVE
CVE-2023-33101
Published
Apr 1, 2024
Updated
Aug 2, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-704, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=315 5G IoT Modem
  2. Affected versionversion=AR8035
  3. Affected versionversion=FastConnect 6200
  4. Affected versionversion=FastConnect 6700
  5. Affected versionversion=FastConnect 6800
  6. Affected versionversion=FastConnect 6900
  7. Affected versionversion=FastConnect 7800
  8. Affected versionversion=QCA6174A
  9. Affected versionversion=QCA6391
  10. Affected versionversion=QCA6421
  11. Affected versionversion=QCA6426
  12. Affected versionversion=QCA6431
  13. Affected versionversion=QCA6436
  14. Affected versionversion=QCA6574A
  15. Affected versionversion=QCA6584AU
  16. Affected versionversion=QCA6595AU
  17. Affected versionversion=QCA6696
  18. Affected versionversion=QCA6698AQ
  19. Affected versionversion=QCA8081
  20. Affected versionversion=QCA8337
  21. Affected versionversion=QCC710
  22. Affected versionversion=QCM4490
  23. Affected versionversion=QCM5430
  24. Affected versionversion=QCM6490
  25. Affected versionversion=QCM8550
  26. Affected versionversion=QCN6024
  27. Affected versionversion=QCN6224
  28. Affected versionversion=QCN6274
  29. Affected versionversion=QCN9024
  30. Affected versionversion=QCS4490
  31. Affected versionversion=QCS5430
  32. Affected versionversion=QCS6490
  33. Affected versionversion=QCS8550
  34. Affected versionversion=QEP8111
  35. Affected versionversion=QFW7114
  36. Affected versionversion=QFW7124
  37. Affected versionversion=Qualcomm Video Collaboration VC3 Platform
  38. Affected versionversion=SD855
  39. Affected versionversion=SD865 5G
  40. Affected versionversion=SD888
  41. Affected versionversion=SDX55
  42. Affected versionversion=SDX57M
  43. Affected versionversion=SG8275P
  44. Affected versionversion=SM7250P
  45. Affected versionversion=SM7315
  46. Affected versionversion=SM7325P
  47. Affected versionversion=SM8550P
  48. Affected versionversion=Snapdragon 480 5G Mobile Platform
  49. Affected versionversion=Snapdragon 480+ 5G Mobile Platform (SM4350-AC)
  50. Affected versionversion=Snapdragon 4 Gen 1 Mobile Platform
  51. Affected versionversion=Snapdragon 4 Gen 2 Mobile Platform
  52. Affected versionversion=Snapdragon 690 5G Mobile Platform
  53. Affected versionversion=Snapdragon 695 5G Mobile Platform
  54. Affected versionversion=Snapdragon 750G 5G Mobile Platform
  55. Affected versionversion=Snapdragon 765 5G Mobile Platform (SM7250-AA)
  56. Affected versionversion=Snapdragon 765G 5G Mobile Platform (SM7250-AB)
  57. Affected versionversion=Snapdragon 768G 5G Mobile Platform (SM7250-AC)
  58. Affected versionversion=Snapdragon 778G 5G Mobile Platform
  59. Affected versionversion=Snapdragon 778G+ 5G Mobile Platform (SM7325-AE)
  60. Affected versionversion=Snapdragon 780G 5G Mobile Platform
  61. Affected versionversion=Snapdragon 782G Mobile Platform (SM7325-AF)
  62. Affected versionversion=Snapdragon 7c+ Gen 3 Compute
  63. Affected versionversion=Snapdragon 855+/860 Mobile Platform (SM8150-AC)
  64. Affected versionversion=Snapdragon 855 Mobile Platform
  65. Affected versionversion=Snapdragon 865 5G Mobile Platform
  66. Affected versionversion=Snapdragon 865+ 5G Mobile Platform (SM8250-AB)
  67. Affected versionversion=Snapdragon 870 5G Mobile Platform (SM8250-AC)
  68. Affected versionversion=Snapdragon 888 5G Mobile Platform
  69. Affected versionversion=Snapdragon 888+ 5G Mobile Platform (SM8350-AC)
  70. Affected versionversion=Snapdragon 8 Gen 1 Mobile Platform
  71. Affected versionversion=Snapdragon 8+ Gen 1 Mobile Platform
  72. Affected versionversion=Snapdragon 8 Gen 2 Mobile Platform
  73. Affected versionversion=Snapdragon 8+ Gen 2 Mobile Platform
  74. Affected versionversion=Snapdragon 8 Gen 3 Mobile Platform
  75. Affected versionversion=Snapdragon Auto 5G Modem-RF
  76. Affected versionversion=Snapdragon Auto 5G Modem-RF Gen 2
  77. Affected versionversion=Snapdragon X35 5G Modem-RF System
  78. Affected versionversion=Snapdragon X55 5G Modem-RF System
  79. Affected versionversion=Snapdragon X65 5G Modem-RF System
  80. Affected versionversion=Snapdragon X70 Modem-RF System
  81. Affected versionversion=Snapdragon X75 5G Modem-RF System
  82. Affected versionversion=Snapdragon XR2 5G Platform
  83. Affected versionversion=SXR2130
  84. Affected versionversion=WCD9340
  85. Affected versionversion=WCD9341
  86. Affected versionversion=WCD9360
  87. Affected versionversion=WCD9370
  88. Affected versionversion=WCD9375
  89. Affected versionversion=WCD9380
  90. Affected versionversion=WCD9385
  91. Affected versionversion=WCD9390
  92. Affected versionversion=WCD9395
  93. Affected versionversion=WCN3950
  94. Affected versionversion=WCN3988
  95. Affected versionversion=WCN6740
  96. Affected versionversion=WSA8810
  97. Affected versionversion=WSA8815
  98. Affected versionversion=WSA8830
  99. Affected versionversion=WSA8832
  100. Affected versionversion=WSA8835
  101. Affected versionversion=WSA8840
  102. Affected versionversion=WSA8845
  103. Affected versionversion=WSA8845H

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=315 5G IoT Modem; version=AR8035; version=FastConnect 6200; version=FastConnect 6700; version=FastConnect 6800; version=FastConnect 6900; version=FastConnect 7800; version=QCA6174A; version=QCA6391; version=QCA6421; version=QCA6426; version=QCA6431; version=QCA6436; version=QCA6574A; version=QCA6584AU; version=QCA6595AU; version=QCA6696; version=QCA6698AQ; version=QCA8081; version=QCA8337; version=QCC710; version=QCM4490; version=QCM5430; version=QCM6490; version=QCM8550; version=QCN6024; version=QCN6224; version=QCN6274; version=QCN9024; version=QCS4490; version=QCS5430; version=QCS6490; version=QCS8550; version=QEP8111; version=QFW7114; version=QFW7124; version=Qualcomm Video Collaboration VC3 Platform; version=SD855; version=SD865 5G; version=SD888; version=SDX55; version=SDX57M; version=SG8275P; version=SM7250P; version=SM7315; version=SM7325P; version=SM8550P; version=Snapdragon 480 5G Mobile Platform; version=Snapdragon 480+ 5G Mobile Platform (SM4350-AC); version=Snapdragon 4 Gen 1 Mobile Platform; version=Snapdragon 4 Gen 2 Mobile Platform; version=Snapdragon 690 5G Mobile Platform; version=Snapdragon 695 5G Mobile Platform; version=Snapdragon 750G 5G Mobile Platform; version=Snapdragon 765 5G Mobile Platform (SM7250-AA); version=Snapdragon 765G 5G Mobile Platform (SM7250-AB); version=Snapdragon 768G 5G Mobile Platform (SM7250-AC); version=Snapdragon 778G 5G Mobile Platform; version=Snapdragon 778G+ 5G Mobile Platform (SM7325-AE); version=Snapdragon 780G 5G Mobile Platform; version=Snapdragon 782G Mobile Platform (SM7325-AF); version=Snapdragon 7c+ Gen 3 Compute; version=Snapdragon 855+/860 Mobile Platform (SM8150-AC); version=Snapdragon 855 Mobile Platform; version=Snapdragon 865 5G Mobile Platform; version=Snapdragon 865+ 5G Mobile Platform (SM8250-AB); version=Snapdragon 870 5G Mobile Platform (SM8250-AC); version=Snapdragon 888 5G Mobile Platform; version=Snapdragon 888+ 5G Mobile Platform (SM8350-AC); version=Snapdragon 8 Gen 1 Mobile Platform; version=Snapdragon 8+ Gen 1 Mobile Platform; version=Snapdragon 8 Gen 2 Mobile Platform; version=Snapdragon 8+ Gen 2 Mobile Platform; version=Snapdragon 8 Gen 3 Mobile Platform; version=Snapdragon Auto 5G Modem-RF; version=Snapdragon Auto 5G Modem-RF Gen 2; version=Snapdragon X35 5G Modem-RF System; version=Snapdragon X55 5G Modem-RF System; version=Snapdragon X65 5G Modem-RF System; version=Snapdragon X70 Modem-RF System; version=Snapdragon X75 5G Modem-RF System; version=Snapdragon XR2 5G Platform; version=SXR2130; version=WCD9340; version=WCD9341; version=WCD9360; version=WCD9370; version=WCD9375; version=WCD9380; version=WCD9385; version=WCD9390; version=WCD9395; version=WCN3950; version=WCN3988; version=WCN6740; version=WSA8810; version=WSA8815; version=WSA8830; version=WSA8832; version=WSA8835; version=WSA8840; version=WSA8845; version=WSA8845H

Published CVSS scores

7.5Qualcomm, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-704Incorrect Type Conversion or Cast
T1499.004Application or System Exploitation

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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