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CVE Record

CVE-2021-34380: Bootloader contains a vulnerability in NVIDIA MB2 where potential heap overflow might cause corruption of t...

Bootloader contains a vulnerability in NVIDIA MB2 where potential heap overflow might cause corruption of the heap metadata, which might lead to arbitrary code execution, denial of service, and information disclosure during secure boot.

HighCVSS 7Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-34380 affects NVIDIA Jetson devices during secure boot. A heap overflow in the MB2 bootloader could allow arbitrary code execution, denial of service, or information disclosure. The issue is high impact, but the published vector is local, high-complexity, and requires low privileges.

Executive priority

Treat as a high-priority embedded platform update where Jetson devices support production, edge, robotics, or sensitive workloads. Risk is not described as remotely exploitable, but successful exploitation could compromise confidentiality, integrity, and availability during boot.

Technical view

The vulnerability is a potential heap overflow in NVIDIA MB2 bootloader code, causing heap metadata corruption during secure boot. CVSS 3.1 is 7.0 with AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. Affected systems are listed Jetson platforms running Jetson Linux versions before r32.5.1.

Likely exposure

Exposure is limited to NVIDIA Jetson TX1, TX2 series, TX2 NX, AGX Xavier series, Xavier NX, Nano, and Nano 2GB devices running Jetson Linux before r32.5.1.

Exploitation context

The bundle does not show CISA KEV listing or other evidence of active exploitation. The CVSS vector indicates local access, high attack complexity, low privileges, and no user interaction, so exposure depends heavily on device access and operational controls.

Researcher notes

Do not broaden scope beyond the listed Jetson products and pre-r32.5.1 Jetson Linux versions. Available evidence names impact and CVSS attributes but does not provide exploitation telemetry, CWE details, or procedural mitigations beyond vendor guidance.

Mitigation direction

  • Update affected Jetson Linux installations to r32.5.1 or later per NVIDIA guidance.
  • Review NVIDIA advisory a_id/5205 for device-specific update instructions.
  • Prioritize devices in production, shared labs, or physically accessible locations.
  • Restrict local access to Jetson systems until updates are confirmed.
  • Track exceptions for devices that cannot be upgraded immediately.

Validation and detection

  • Inventory Jetson model and Jetson Linux release across managed devices.
  • Confirm each affected device is running r32.5.1 or later.
  • Verify bootloader components were updated, not only application packages.
  • Check for unmanaged Jetson devices in labs, edge deployments, and prototypes.
  • Document compensating access controls for any deferred upgrades.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-34380 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7CVSS 3.1HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H15.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7High
CVSS 3.1 vector shape for CVE-2021-34380Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
NVIDIANVIDIA Jetson TX1, TX2 series, TX2 NX, AGX Xavier series, Xavier NX, Nano and Nano 2GBAll Jetson Linux versions prior to r32.5.1Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.