CVE-2026-97569

Transmit-queue hang via suppressed descriptor completions

Published Sep 25, 2026 · Updated Sep 25, 2026

Denial of service in the Linux 7.1 bnxt_en driver allows attackers to stop a transmit queue indefinitely via crafted traffic. The transmit path suppresses every descriptor completion, then exits early when a large software-USO packet cannot fit, leaving no completion to clean the full ring. Triggering the flaw requires a nondefault transmit ring of 457 descriptors or fewer, a filling packet burst, and a large software-USO packet; the affected queue does not restart.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux 7.1 bnxt_en driver allows attackers to stop a transmit queue indefinitely via crafted traffic. The transmit path suppresses every descriptor completion, then exits early when a large software-USO packet cannot fit, leaving no completion to clean the full ring. Triggering the flaw requires a nondefault transmit ring of 457 descriptors or fewer, a filling packet burst, and a large software-USO packet; the affected queue does not restart.

The record

CVE
CVE-2026-97569
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=7.1
  2. Affected versionversion=cc5d90667db81474ed7a92a1b2fa3daec5559307 <39b23c1c40e1f73d2b94a09282cc476af647e438
  3. Affected versionversion=cc5d90667db81474ed7a92a1b2fa3daec5559307 <e33ce547c0cd40738d6bad23e5fc0539ee3e8f7d

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=7.1; version=cc5d90667db81474ed7a92a1b2fa3daec5559307 <39b23c1c40e1f73d2b94a09282cc476af647e438; version=cc5d90667db81474ed7a92a1b2fa3daec5559307 <e33ce547c0cd40738d6bad23e5fc0539ee3e8f7d

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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