CVE-2026-47621Network attack vector

Service interruption and data tampering via initialization race

Published Aug 4, 2026 · Updated Aug 4, 2026

TOCTOU race in NVIDIA Dynamo 1.1.0 and earlier allows remote attackers to interrupt service or tamper with LoRA manager state. NVIDIA identifies a time-of-check/time-of-use race during LoRA manager singleton initialization but does not disclose the affected function or the operations separated by the race window. Network access without authentication is sufficient, but exploitation requires winning the race; successful attempts can interrupt service or corrupt application data.

CVSS severity6.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

TOCTOU race in NVIDIA Dynamo 1.1.0 and earlier allows remote attackers to interrupt service or tamper with LoRA manager state. NVIDIA identifies a time-of-check/time-of-use race during LoRA manager singleton initialization but does not disclose the affected function or the operations separated by the race window. Network access without authentication is sufficient, but exploitation requires winning the race; successful attempts can interrupt service or corrupt application data.

The record

CVE
CVE-2026-47621
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
DPDK Project
Product
NVIDIA Dynamo
Classifications
CWE-367, CAPEC-29, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2026Record 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=0 to v1.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DPDK Project · NVIDIA Dynamoversion=0 to v1.1.0

Published CVSS scores

6.5NVIDIACVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CAPEC-29Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
T1499Endpoint Denial of Service

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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