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CVE Record

CVE-2021-34388: Bootloader contains a vulnerability in NVIDIA TegraBoot where a potential heap overflow might allow an atta...

Bootloader contains a vulnerability in NVIDIA TegraBoot where a potential heap overflow might allow an attacker to control all the RAM after the heap block, leading to denial of service or code execution.

MediumCVSS 6.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-34388 is a vulnerability in NVIDIA TegraBoot used by Jetson devices. A local attacker with low privileges could potentially corrupt bootloader heap memory, causing denial of service or code execution. The known affected scope is Jetson Linux releases before r32.5.1 on listed Jetson platforms.

Executive priority

Treat this as a moderate embedded-device risk. Prioritize remediation for Jetson systems in operational, exposed, or shared-access environments because successful exploitation could disrupt availability or alter system behavior.

Technical view

The issue is described as a potential heap overflow in NVIDIA TegraBoot. The CVSS vector is local access, high attack complexity, low privileges, no user interaction, unchanged scope, no confidentiality impact, and high integrity and availability impact. NVIDIA lists Jetson Linux versions before r32.5.1 as affected.

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 source bundle does not show CISA KEV listing or active exploitation. Based on the CVSS vector, exploitation requires local access and low privileges, with high complexity and no user interaction.

Researcher notes

Evidence is limited to the CVE description, CVSS vector, affected product list, and NVIDIA advisory reference. No CWE, proof-of-concept status, exploitation report, or detailed patch mechanics are provided in the source bundle.

Mitigation direction

  • Inventory affected NVIDIA Jetson device models.
  • Upgrade Jetson Linux to r32.5.1 or later per NVIDIA guidance.
  • Review NVIDIA advisory for supported remediation details.
  • Restrict local access to affected devices until updated.
  • Track exceptions where Jetson Linux cannot be upgraded.

Validation and detection

  • Confirm each Jetson device model and Jetson Linux release.
  • Verify affected devices are not running versions before r32.5.1.
  • Check vulnerability records against NVIDIA advisory details.
  • Document compensating controls for unpatched devices.
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-2021-34388 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
Medium
CVSS
6.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/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
6.3CVSS 3.1MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H15.2Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.3Medium
CVSS 3.1 vector shape for CVE-2021-34388Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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