Security readout for executives and security teams
Plain-English summary
CVE-2021-34391 affects NVIDIA Jetson TX1 systems running Jetson Linux before r32.5.1. A flaw in the Trusty NVIDIA TLK kernel can allow an integer overflow through a user-triggered SMC call, potentially causing denial of service. The business impact is availability disruption, not data theft or tampering based on the provided sources.
Executive priority
Treat this as a moderate availability risk for Jetson TX1 deployments. Prioritize remediation where affected devices support production, physical operations, security monitoring, or other uptime-sensitive workloads. This is not evidenced as actively exploited in the provided sources.
Technical view
The CVSS 3.1 vector is AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H with score 5.3. The vulnerability is an integer overflow in an NVIDIA TLK kernel function within Trusty, reachable through a specific user-triggered SMC call. Sources identify Jetson TX1 and Jetson Linux versions before r32.5.1 as affected.
Likely exposure
Exposure is limited to NVIDIA Jetson TX1 devices running Jetson Linux earlier than r32.5.1. The CVSS vector indicates local attack access, low privileges, high attack complexity, and required user interaction. No remote network exposure is indicated in the provided bundle.
Exploitation context
The source bundle does not indicate active exploitation, public exploit availability, or KEV listing. The described impact is denial of service only. Exploitation appears constrained by local access, low privileges, user interaction, and high complexity, but affected embedded or edge devices may still face operational disruption.
Researcher notes
Evidence is sparse: no CWE is listed, and the bundle provides limited implementation detail. Focus validation on asset/version identification and NVIDIA advisory alignment. Do not assume broader Jetson products are affected unless confirmed by vendor sources.
Mitigation direction
- Inventory NVIDIA Jetson TX1 devices and record Jetson Linux versions.
- Upgrade affected systems to Jetson Linux r32.5.1 or later where supported.
- Restrict local access to Jetson TX1 systems to trusted users only.
- Review NVIDIA advisory guidance for supported update paths and operational constraints.
- Monitor affected devices for unexpected crashes, reboots, or availability loss.
Validation and detection
- Confirm whether any deployed hardware is NVIDIA Jetson TX1.
- Check each Jetson TX1 device for Jetson Linux version before r32.5.1.
- Verify patched devices report Jetson Linux r32.5.1 or later.
- Review access controls for users with local device access.
- Confirm availability monitoring covers affected edge or embedded deployments.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
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CVE-2021-34391 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H0.84Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://nvidia.custhelp.com/app/answers/detail/a_id/5205CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.