FreeIPMI up to 1.16.16 buffer overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in FreeIPMI up to 1.16.16. The affected element is an unknown function. The manipulation leads to buffer overflow. This vulnerability is uniquely identified as CVE-2026-33554. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in FreeIPMI up to 1.16.16 and classified as critical. This issue affects an unknown functionality. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

ipmi-oem in FreeIPMI before 1.6.17 has exploitable buffer overflows on response messages. The Intelligent Platform Management Interface (IPMI) specification defines a set of interfaces for platform management. It is implemented by a large number of hardware manufacturers to support system management. It is most commonly used for sensor reading (e.g., CPU temperatures through the ipmi-sensors command within FreeIPMI) and remote power control (the ipmipower command). The ipmi-oem client command implements a set of a IPMI OEM commands for specific hardware vendors. If a user has supported hardware, they may wish to use the ipmi-oem command to send a request to a server to retrieve specific information. Three subcommands were found to have exploitable buffer overflows on response messages. They are: "ipmi-oem dell get-last-post-code - get the last POST code and string describing the error on some Dell servers," "ipmi-oem supermicro extra-firmware-info - get extra firmware info on Supermicro servers," and "ipmi-oem wistron read-proprietary-string - read a proprietary string on Wistron servers."

It is possible to read the advisory at savannah.gnu.org. The identification of this vulnerability is CVE-2026-33554 since 03/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 312089 (RHEL 10 : freeipmi (RHSA-2026:13515)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.16.17 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (312089) and CERT Bund (WID-SEC-2026-1350). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• RESF Rocky Linux

Productinfo

Name

• FreeIPMI

Version

• 1.16.0
• 1.16.1
• 1.16.2
• 1.16.3
• 1.16.4
• 1.16.5
• 1.16.6
• 1.16.7
• 1.16.8
• 1.16.9
• 1.16.10
• 1.16.11
• 1.16.12
• 1.16.13
• 1.16.14
• 1.16.15
• 1.16.16

CPE 2.3info

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CPE 2.2info

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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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