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CVE-2026-84058 – Buffer Overflow (DoS / Potential RCE) – IBM Guardium Data Protection 12.0, 12.1, 12

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Summary

CVE-2026-84058 is a buffer overrun vulnerability (CWE-119) in the TDS (Microsoft SQL Server) PRELOGIN packet decoder of IBM Guardium Data Protection 12.0, 12.1 and 12.2. A remote, unauthenticated attacker can send a crafted packet to cause denial of service or potentially execute arbitrary code on the Collector appliance. The CVSS v3.1 base score is 8.1 (High).

Technical details

  • Root cause: buffer overrun (CWE-119, improper restriction of operations within the bounds of a memory buffer) in the TDS (Microsoft SQL Server) PRELOGIN packet decoder.
  • Trigger conditions: a specially crafted PRELOGIN packet is sent to the affected component. No authentication or user interaction is required; attack complexity is rated high.
  • Attack vector: network.
  • Impact: denial of service, or potentially arbitrary code execution, on the Collector appliance.

Affected software

  • IBM Guardium Data Protection 12.0
  • IBM Guardium Data Protection 12.1
  • IBM Guardium Data Protection 12.2

Severity

CVSS v3.1 base score 8.1 (High): CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: apply the patch published by IBM through Fix Central (a Sniffer component update) as described in the IBM security bulletin. Specific patch identifiers are listed in that bulletin.
  • Workarounds: IBM lists none. Patching is the only remediation.

References

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