CVE-2021-34387

Kernel memory overwrite via executable DRAM mapping

Published Jun 21, 2021 · Updated Aug 4, 2024

Incorrect permissions in TLK on NVIDIA Jetson TX1 before 32.5.1 allow local users to overwrite protected TrustZone kernel memory. TLK identity-maps TrustZone-reserved DRAM with read, write, and execute permissions, making otherwise read-only kernel code and data writable. Exposure exists only when TLK is in use, and exploitation requires high local privileges and user interaction, placing trusted code and protected data at risk.

CVSS severity6.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect permissions in TLK on NVIDIA Jetson TX1 before 32.5.1 allow local users to overwrite protected TrustZone kernel memory. TLK identity-maps TrustZone-reserved DRAM with read, write, and execute permissions, making otherwise read-only kernel code and data writable. Exposure exists only when TLK is in use, and exploitation requires high local privileges and user interaction, placing trusted code and protected data at risk.

The record

CVE
CVE-2021-34387
Published
Jun 21, 2021
Updated
Aug 4, 2024
Vendor
DPDK Project
Product
NVIDIA Jetson TX1
Classifications
CWE-276, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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 Jetson Linux versions prior to r32.5.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

DPDK Project · NVIDIA Jetson TX1version=All Jetson Linux versions prior to r32.5.1

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
6.3NVIDIA CorporationCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
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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