Intel Xeon 6 out-of-bounds write

Summaryinfo

A vulnerability was found in Intel Xeon 6. It has been rated as critical. This affects an unknown part. The manipulation leads to out-of-bounds write. This vulnerability is traded as CVE-2025-26403. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability was found in Intel Xeon 6 (version unknown) and classified as problematic. This issue affects an unknown function. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Out-of-bounds write in the memory subsystem for some Intel(R) Xeon(R) 6 processors when using Intel(R) SGX or Intel(R) TDX may allow a privileged user to potentially enable escalation of privilege via local access.

It is possible to read the advisory at intel.com. The identification of this vulnerability is CVE-2025-26403 since 03/27/2025. The exploitation is known to be difficult. Attacking locally is a requirement. Additional levels of successful authentication are needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/02/2025).

The vulnerability scanner Nessus provides a plugin with the ID 260028 (Linux Distros Unpatched Vulnerability : CVE-2025-26403), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the databases at Tenable (260028) and CERT Bund (WID-SEC-2025-1785). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Debian Linux
• Amazon Linux 2
• SUSE Linux
• Dell PowerEdge
• Lenovo Computer
• HPE ProLiant
• SUSE openSUSE
• HP Computer
• Dell PowerScale
• Dell Computer
• Dell Avamar
• Intel Prozessor
• Dell NetWorker

Productinfo

Type

• Chip Software

Vendor

• Intel

Name

• Xeon 6

License

• commercial

Website

• Vendor: https://www.intel.com/

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CPE 2.2info

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

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