Privilege escalation via memory subsystem out-of-bounds write
Published Aug 12, 2025 · Updated Feb 26, 2026
An out-of-bounds write in some Intel Xeon 6 processors allows local users with high privileges to escalate through SGX or TDX. The flaw writes beyond an unspecified buffer in the processor memory subsystem; Intel has not disclosed the affected operation or input. Reachability requires SGX or TDX on an affected server processor, local access, high privileges, and a high-complexity attack; success compromises confidentiality and integrity across a security boundary.
Summary
What happened
An out-of-bounds write in some Intel Xeon 6 processors allows local users with high privileges to escalate through SGX or TDX. The flaw writes beyond an unspecified buffer in the processor memory subsystem; Intel has not disclosed the affected operation or input. Reachability requires SGX or TDX on an affected server processor, local access, high privileges, and a high-complexity attack; success compromises confidentiality and integrity across a security boundary.
The record
- CVE
- CVE-2025-26403
- Published
- Aug 12, 2025
- Updated
- Feb 26, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Aug 12, 2025CVE publishedPublication date reported by the CVE source.
- Feb 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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