IBM Guardium Data Protection 12.0/12.1/12.2 TDS PRELOGIN Packet Decoder buffer overflow

Summaryinfo

A vulnerability identified as very critical has been detected in IBM Guardium Data Protection 12.0/12.1/12.2. Affected by this issue is some unknown functionality of the component TDS PRELOGIN Packet Decoder. This manipulation causes buffer overflow. The identification of this vulnerability is CVE-2026-84058. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in IBM Guardium Data Protection 12.0/12.1/12.2 and classified as very critical. Affected by this vulnerability is some unknown functionality of the component TDS PRELOGIN Packet Decoder. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

IBM Guardium Data Protection 12.0, 12.1, and 12.2 is vulnerable to a buffer overrun in the TDS (Microsoft SQL Server) PRELOGIN packet decoder. A remote attacker who can send a specially crafted TDS PRELOGIN packet to a network monitored by an IBM Guardium Collector may cause a denial of service or potentially execute arbitrary code on the Collector appliance.

The advisory is shared at ibm.com. This vulnerability is known as CVE-2026-84058 since 09/01/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/09/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• IBM

Name

• Guardium Data Protection

Version

• 12.0
• 12.1
• 12.2

License

• commercial

Website

• Vendor: https://www.ibm.com/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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