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Dgx A100 FirmwareOperating system · Nvidia

CVE-2022-42276

HIGH · 8.2 CVSS v3.1 Published 2023-01-13
Fix available
A fix is available. Upgrade to 1.18 or later.
See remediation →
84/100
Remediation priority · High
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
NVIDIA DGX A100 contains a vulnerability in SBIOS in the SmiFlash, where a local user with elevated privileges can read, write and erase flash, which may lead to code execution, escalation of privileges, denial of service, and information disclosure. The scope of impact can extend to other components.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The NVIDIA DGX A100 contains a vulnerability in the SBIOS SmiFlash utility where a local user with elevated privileges can read, write, and erase the system flash, enabling arbitrary code execution, privilege escalation, denial of service, and information disclosure. The impact can propagate to other system components.

MitigationApply the NVIDIA firmware/BIOS update provided for the DGX A100 system. Restrict administrative access to the SmiFlash utility and monitor for unauthorized flash modifications.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Dgx A100 FirmwareOperating system
Affected:< 1.18

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the system model
    Check system product name/model (e.g., via dmidecode, BMC web interface, or system inventory). Look for 'DGX A100' in the product field.
    Affected if The system is not an NVIDIA DGX A100 (this CVE only affects that specific platform)
  2. Check the SBIOS firmware version
    Retrieve the SBIOS/UEFI firmware version from the DGX A100 (typically via BMC interface, NVIDIA System Management tool, or dmidecode -s bios-version). Compare the installed version to the affected range.
    Affected if The installed SBIOS firmware version is earlier than 1.18 (any version < 1.18 is affected)
  3. Verify SmiFlash utility configuration
    Examine the SmiFlash utility setup on the system. Check if there are access controls, permissions, or privilege escalation paths that could allow a local user with elevated privileges to access flash read/write/erase functions.
    Affected if The SmiFlash utility permits a local user with elevated privileges to read, write, or erase system flash (the vulnerability only manifests when this access is possible)
  4. Review user privileges on the system
    Audit local user accounts and their privilege levels on the DGX A100 system. Identify if any non-administrative or lower-privilege accounts could potentially gain elevated access to flash utilities.
    Affected if There exist local users with elevated privileges who could potentially exploit the SmiFlash utility (the attack requires a local user with elevated privileges)
  5. Inspect flash modification logging
    Check system logs, BMC audit logs, or flash modification records for any unauthorized or unexpected flash changes that may indicate exploitation of this vulnerability.
    Affected if Evidence exists of unauthorized flash modifications that could indicate this vulnerability has been exploited

The user is affected if the system is a DGX A100 with SBIOS firmware version earlier than 1.18 and the SmiFlash utility allows access to local users with elevated privileges.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 1.18 or later
Fixed in 1.18
Interim mitigation

Apply the NVIDIA firmware/BIOS update provided for the DGX A100 system. Restrict administrative access to the SmiFlash utility and monitor for unauthorized flash modifications.

Recommended fix Moderate confidence

DGX A100 Firmware version 1.18 or later

  1. Identify the current firmware version of the NVIDIA DGX A100 system using the NVIDIA System Management Interface (nvidia-smi) or BMC interface
  2. Download the DGX A100 firmware update package version 1.18 or later from the NVIDIA enterprise software downloads portal
  3. Review the firmware update release notes for any prerequisites or special instructions
  4. Apply the firmware update following NVIDIA's documented firmware update procedure for DGX A100 systems, typically via the SBIOS or BMC interface
  5. Verify the firmware has been successfully updated to version 1.18 or later after the update process completes
Caveat Firmware updates carry inherent risks; ensure proper backup and follow NVIDIA's update procedure to avoid system unavailability

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Dgx A100 Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,980
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-42276 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data