CVE-2026-68291

Kernel crash via stale max_vports state

Published Aug 10, 2026 · Updated Aug 10, 2026

NULL pointer dereference in the Linux kernel idpf driver 6.7 through 7.1.5 and 7.2-rc1 through 7.2-rc4 allows local users to crash the system. After a vport-related buffer allocation fails during initialization, the driver leaves adapter->max_vports set although the vport arrays are absent, so idpf_remove dereferences a null array during reset or removal. Reachability requires an idpf device, allocation failure during initialization, and a later reset or privileged module removal; the bounded consequence is a kernel crash.

CVSS severity4.1
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel idpf driver 6.7 through 7.1.5 and 7.2-rc1 through 7.2-rc4 allows local users to crash the system. After a vport-related buffer allocation fails during initialization, the driver leaves adapter->max_vports set although the vport arrays are absent, so idpf_remove dereferences a null array during reset or removal. Reachability requires an idpf device, allocation failure during initialization, and a later reset or privileged module removal; the bounded consequence is a kernel crash.

The record

CVE
CVE-2026-68291
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=0fe45467a1041ea3657a7fa3a791c84c104fbd34 <237f1f7653b8729169af11fae79f01b90d00b87e
  2. Affected versionversion=0fe45467a1041ea3657a7fa3a791c84c104fbd34 <9fbe22b7aff0a65984d78ee6b93e2f8179abd1f5
  3. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=0fe45467a1041ea3657a7fa3a791c84c104fbd34 <237f1f7653b8729169af11fae79f01b90d00b87e; version=0fe45467a1041ea3657a7fa3a791c84c104fbd34 <9fbe22b7aff0a65984d78ee6b93e2f8179abd1f5; version=6.7

Published CVSS scores

4.1Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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