CVE-2026-98427Public exploit

Kernel soft lockup via unbounded packet dropping

Published Oct 14, 2026 · Updated Oct 14, 2026

Denial of service in Linux CoDel queue handling allows local users to cause a kernel soft lockup via packet traffic. In codel_dequeue(), a small interval rounds the next-drop increment to zero, and the unbounded dropping loop drains the backlog while holding the queue lock. Triggering requires traffic through a suitably configured queue; the documented result is a soft lockup, not code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
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 Linux CoDel queue handling allows local users to cause a kernel soft lockup via packet traffic. In codel_dequeue(), a small interval rounds the next-drop increment to zero, and the unbounded dropping loop drains the backlog while holding the queue lock. Triggering requires traffic through a suitably configured queue; the documented result is a soft lockup, not code execution.

The record

CVE
CVE-2026-98427
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 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=3.5
  2. Affected versionversion=76e3cc126bb223013a6b9a0e2a51238d1ef2e409 <7f4a5ec6258fd7c92633ec4b0493fc51166d9398
  3. Affected versionversion=76e3cc126bb223013a6b9a0e2a51238d1ef2e409 <bacd72289d34d8c05b7de5a12448b87b6dd93878

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.5; version=76e3cc126bb223013a6b9a0e2a51238d1ef2e409 <7f4a5ec6258fd7c92633ec4b0493fc51166d9398; version=76e3cc126bb223013a6b9a0e2a51238d1ef2e409 <bacd72289d34d8c05b7de5a12448b87b6dd93878

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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

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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