CVE-2023-21636

Memory corruption via unchecked ADN array index

Published Sep 5, 2023 · Updated Aug 2, 2024

Memory corruption in Qualcomm Snapdragon RIL on affected chipsets allows local users to corrupt memory while updating an ADN record. The Linux RIL code fails to validate an array index before using it during the update, permitting an out-of-bounds memory access. Exploitation requires local high privileges and no user interaction; Qualcomm reports confidentiality, integrity, and availability impact but discloses no finer code-level locus.

CVSS severity6.7
Medium
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

Memory corruption in Qualcomm Snapdragon RIL on affected chipsets allows local users to corrupt memory while updating an ADN record. The Linux RIL code fails to validate an array index before using it during the update, permitting an out-of-bounds memory access. Exploitation requires local high privileges and no user interaction; Qualcomm reports confidentiality, integrity, and availability impact but discloses no finer code-level locus.

The record

CVE
CVE-2023-21636
Published
Sep 5, 2023
Updated
Aug 2, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-129
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 5, 2023CVE 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=AQT1000
  2. Affected versionversion=QCA6390
  3. Affected versionversion=QCA6391
  4. Affected versionversion=QCA6420
  5. Affected versionversion=QCA6426
  6. Affected versionversion=QCA6430
  7. Affected versionversion=QCA6436
  8. Affected versionversion=QCA6574A
  9. Affected versionversion=QCA6574AU
  10. Affected versionversion=QCA6595AU
  11. Affected versionversion=QCA6696
  12. Affected versionversion=QCC5100
  13. Affected versionversion=SA515M
  14. Affected versionversion=SA6145P
  15. Affected versionversion=SA6150P
  16. Affected versionversion=SA6155P
  17. Affected versionversion=SA8145P
  18. Affected versionversion=SA8150P
  19. Affected versionversion=SA8155P
  20. Affected versionversion=SA8195P
  21. Affected versionversion=SD480
  22. Affected versionversion=SD695
  23. Affected versionversion=SD855
  24. Affected versionversion=SD865 5G
  25. Affected versionversion=SD870
  26. Affected versionversion=SDA429W
  27. Affected versionversion=SDX55
  28. Affected versionversion=SDX55M
  29. Affected versionversion=SDXR2 5G
  30. Affected versionversion=SM4375
  31. Affected versionversion=SW5100
  32. Affected versionversion=SW5100P
  33. Affected versionversion=WCD9341
  34. Affected versionversion=WCD9360
  35. Affected versionversion=WCD9370
  36. Affected versionversion=WCD9375
  37. Affected versionversion=WCD9380
  38. Affected versionversion=WCD9385
  39. Affected versionversion=WCN3610
  40. Affected versionversion=WCN3660B
  41. Affected versionversion=WCN3680B
  42. Affected versionversion=WCN3980
  43. Affected versionversion=WCN3988
  44. Affected versionversion=WCN3991
  45. Affected versionversion=WCN3998
  46. Affected versionversion=WCN6850
  47. Affected versionversion=WCN6851
  48. Affected versionversion=WSA8810
  49. Affected versionversion=WSA8815
  50. Affected versionversion=WSA8830
  51. Affected versionversion=WSA8835

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Qualcomm · Snapdragonversion=AQT1000; version=QCA6390; version=QCA6391; version=QCA6420; version=QCA6426; version=QCA6430; version=QCA6436; version=QCA6574A; version=QCA6574AU; version=QCA6595AU; version=QCA6696; version=QCC5100; version=SA515M; version=SA6145P; version=SA6150P; version=SA6155P; version=SA8145P; version=SA8150P; version=SA8155P; version=SA8195P; version=SD480; version=SD695; version=SD855; version=SD865 5G; version=SD870; version=SDA429W; version=SDX55; version=SDX55M; version=SDXR2 5G; version=SM4375; version=SW5100; version=SW5100P; version=WCD9341; version=WCD9360; version=WCD9370; version=WCD9375; version=WCD9380; version=WCD9385; version=WCN3610; version=WCN3660B; version=WCN3680B; version=WCN3980; version=WCN3988; version=WCN3991; version=WCN3998; version=WCN6850; version=WCN6851; version=WSA8810; version=WSA8815; version=WSA8830; version=WSA8835

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.7Qualcomm, Inc.CVSS:3.1/AV:L/AC:L/PR:H/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index

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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