CVE-2023-0202

Privilege escalation via arbitrary SMRAM modification

Published Apr 22, 2023 · Updated Feb 4, 2025

Memory corruption in NVIDIA DGX A100 SBIOS before 1.18 allows local users to modify arbitrary SMRAM through SMM APIs. The GenericSio and LegacySmmSredir SMM APIs permit writes to arbitrary SMRAM addresses without adequately restricting memory-buffer operations. Exploitation requires high-privilege local code execution and can expose firmware-resident data, corrupt protected state, escalate privileges, or interrupt service.

CVSS severity7.5
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in NVIDIA DGX A100 SBIOS before 1.18 allows local users to modify arbitrary SMRAM through SMM APIs. The GenericSio and LegacySmmSredir SMM APIs permit writes to arbitrary SMRAM addresses without adequately restricting memory-buffer operations. Exploitation requires high-privilege local code execution and can expose firmware-resident data, corrupt protected state, escalate privileges, or interrupt service.

The record

CVE
CVE-2023-0202
Published
Apr 22, 2023
Updated
Feb 4, 2025
Vendor
NVIDIA
Product
NVIDIA DGX Systems
Classifications
CWE-119, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All SBIOS versions prior to 1.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

NVIDIA · NVIDIA DGX Systemsversion=All SBIOS versions prior to 1.18

Published CVSS scores

7.5NVIDIA CorporationCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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