Host impersonation via cloned SSH host keys
Published May 20, 2026 · Updated May 20, 2026
Cryptographic key reuse in NVIDIA DGX OS before OTA0 allows remote attackers to impersonate DGX Spark hosts over SSH. The factory provisioning process clones a base image after SSH host keys and the machine ID have been generated, deploying identical identifiers to multiple systems. Exploitation requires obtaining the shared private host key and a network position permitting SSH traffic interception, enabling attacker-in-the-middle access and subsequent code execution, data tampering, privilege escalation, information disclosure, or service interruption.
Summary
What happened
Cryptographic key reuse in NVIDIA DGX OS before OTA0 allows remote attackers to impersonate DGX Spark hosts over SSH. The factory provisioning process clones a base image after SSH host keys and the machine ID have been generated, deploying identical identifiers to multiple systems. Exploitation requires obtaining the shared private host key and a network position permitting SSH traffic interception, enabling attacker-in-the-middle access and subsequent code execution, data tampering, privilege escalation, information disclosure, or service interruption.
The record
- CVE
- CVE-2026-24218
- Published
- May 20, 2026
- Updated
- May 20, 2026
- Vendor
- DPDK Project
- Product
- DGX Spark
- Classifications
- CWE-321, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 20, 2026CVE publishedPublication date reported by the CVE source.
- May 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <OTA0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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