# CVE-2026-47621: NVIDIA Dynamo race condition in LoRA manager singleton initialization

Source: https://junglewise.ai/threats/cve-2026-47621-nvidia-dynamo-race-condition-in-lora-manager-singleton  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-04. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-47621 · Severity: medium · CVSS 6.5 · Published 2026-08-04

NVIDIA Dynamo is a deep learning optimization framework for Linux systems. A race condition in the LoRA (Low-Rank Adaptation) manager could allow an attacker to cause denial of service or corrupt data during concurrent initialization, potentially disrupting ML training workloads and compromising model integrity.

Technologies: [Linux Kernel](https://junglewise.ai/threats/technologies/kernel), [Nvidia Dynamo](https://junglewise.ai/threats/technologies/dynamo). Vendors: [Linux](https://junglewise.ai/threats/vendors/linux), [Nvidia](https://junglewise.ai/threats/vendors/nvidia).

## Quick answers

**Is CVE-2026-47621 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-47621 being exploited in the wild.

**How severe is CVE-2026-47621?** Medium severity, with a CVSS score of 6.5, published 4 August 2026.

**Which products and versions are affected?** NVIDIA Dynamo.

**Is there a fix for CVE-2026-47621?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-47621 attacked?** It is attacked with local access or over the network, in a software library.

**Am I affected by CVE-2026-47621?** Check whether you run Linux Kernel or Nvidia Dynamo. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a race condition in the LoRA manager singleton initialization within NVIDIA Dynamo for Linux. The race condition occurs during concurrent access to the singleton object initialization, allowing multiple threads to execute initialization code simultaneously without proper synchronization. An attacker with local access or network access to trigger concurrent operations can exploit this to cause denial of service or data tampering. The vulnerability is medium severity with a CVSS score of 6.5, and has not been exploited in the wild at the time of advisory publication.

## Affected products

- NVIDIA Dynamo

## Timeline

- 2026-08-04: disclosed

## References

- [https://github.com/NVIDIA/product-security/tree/main/2026/5842](https://github.com/NVIDIA/product-security/tree/main/2026/5842)
- [https://www.cve.org/CVERecord?id=CVE-2026-47621](https://www.cve.org/CVERecord?id=CVE-2026-47621)

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