CVE-2023-28063

Administrator-triggered denial of service via signed-to-unsigned conversion

Published Feb 6, 2024 · Updated Aug 2, 2024

Signed-to-unsigned conversion error in Dell Client Platform BIOS allows local users with administrator privileges to cause a service interrupt. Dell has not published the affected firmware locus, the value that is converted, or how that value reaches the conversion. Exploitation requires local authenticated administrator access; the advisory does not specify whether the denial of service is a hang, crash, reboot, or shutdown.

CVSS severity6.7
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Signed-to-unsigned conversion error in Dell Client Platform BIOS allows local users with administrator privileges to cause a service interrupt. Dell has not published the affected firmware locus, the value that is converted, or how that value reaches the conversion. Exploitation requires local authenticated administrator access; the advisory does not specify whether the denial of service is a hang, crash, reboot, or shutdown.

The record

CVE
CVE-2023-28063
Published
Feb 6, 2024
Updated
Aug 2, 2024
Vendor
Dell
Product
Dell Client Platform BIOS
Classifications
CWE-195, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 6, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1.1.0
  2. Affected versionversion=1.10.0
  3. Affected versionversion=1.11.0
  4. Affected versionversion=1.12.0
  5. Affected versionversion=1.12.1
  6. Affected versionversion=1.1.28
  7. Affected versionversion=1.13.0
  8. Affected versionversion=1.13.1
  9. Affected versionversion=1.13.2
  10. Affected versionversion=1.14.0
  11. Affected versionversion=1.14.1
  12. Affected versionversion=1.15.0
  13. Affected versionversion=1.16.0
  14. Affected versionversion=1.17.0
  15. Affected versionversion=1.17.1
  16. Affected versionversion=1.18.0
  17. Affected versionversion=1.18.1
  18. Affected versionversion=1.19.0
  19. Affected versionversion=1.20.0
  20. Affected versionversion=1.21.0
  21. Affected versionversion=1.22.0
  22. Affected versionversion=1.22.1
  23. Affected versionversion=1.23.0
  24. Affected versionversion=1.24.0
  25. Affected versionversion=1.24.1
  26. Affected versionversion=1.25.0
  27. Affected versionversion=1.26.0
  28. Affected versionversion=1.26.1
  29. Affected versionversion=1.26.8
  30. Affected versionversion=1.27.0
  31. Affected versionversion=1.28.0
  32. Affected versionversion=1.29.0
  33. Affected versionversion=1.29.1
  34. Affected versionversion=1.30.0
  35. Affected versionversion=1.31.0
  36. Affected versionversion=1.33.0
  37. Affected versionversion=1.4.1
  38. Affected versionversion=1.5.1
  39. Affected versionversion=1.7.0
  40. Affected versionversion=1.8.1
  41. Affected versionversion=2.14.0
  42. Affected versionversion=2.19.0
  43. Affected versionversion=2.20.0
  44. Affected versionversion=2.21.0
  45. Affected versionversion=2.4.0
  46. Affected versionversion=2.5.1
  47. Affected versionversion=2.6.1
  48. Affected versionversion=3.17.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Dell · Dell Client Platform BIOSversion=1.1.0; version=1.10.0; version=1.11.0; version=1.12.0; version=1.12.1; version=1.1.28; version=1.13.0; version=1.13.1; version=1.13.2; version=1.14.0; version=1.14.1; version=1.15.0; version=1.16.0; version=1.17.0; version=1.17.1; version=1.18.0; version=1.18.1; version=1.19.0; version=1.20.0; version=1.21.0; version=1.22.0; version=1.22.1; version=1.23.0; version=1.24.0; version=1.24.1; version=1.25.0; version=1.26.0; version=1.26.1; version=1.26.8; version=1.27.0; version=1.28.0; version=1.29.0; version=1.29.1; version=1.30.0; version=1.31.0; version=1.33.0; version=1.4.1; version=1.5.1; version=1.7.0; version=1.8.1; version=2.14.0; version=2.19.0; version=2.20.0; version=2.21.0; version=2.4.0; version=2.5.1; version=2.6.1; version=3.17.0

Published CVSS scores

6.7DellCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-195Signed to Unsigned Conversion Error
T1499Endpoint Denial of Service

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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