CVE-2026-22981Hinoki check available

Kernel crash via exposed idpf reset callbacks

Published Jan 23, 2026 · Updated Jan 23, 2026

NULL pointer dereference in the Linux Kernel idpf driver allows local users to crash the kernel during failed network-interface resets. The reset path deallocates vport resources while leaving the netdev exposed to callbacks, so a later ifup or ifdown reaches idpf_stop with uninitialized state. Triggering requires local privileges to manipulate the idpf interface or reset controls; the documented consequence is loss of interface state or a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

NULL pointer dereference in the Linux Kernel idpf driver allows local users to crash the kernel during failed network-interface resets. The reset path deallocates vport resources while leaving the netdev exposed to callbacks, so a later ifup or ifdown reaches idpf_stop with uninitialized state. Triggering requires local privileges to manipulate the idpf interface or reset controls; the documented consequence is loss of interface state or a kernel crash.

The record

CVE
CVE-2026-22981
Published
Jan 23, 2026
Updated
Jan 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 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 <2e281e1155fc476c571c0bd2ffbfe28ab829a5c3
  2. Affected versionversion=0fe45467a1041ea3657a7fa3a791c84c104fbd34 <ac122f5fb050903b3d262001562c452be95eaf70
  3. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0fe45467a1041ea3657a7fa3a791c84c104fbd34 <2e281e1155fc476c571c0bd2ffbfe28ab829a5c3; version=0fe45467a1041ea3657a7fa3a791c84c104fbd34 <ac122f5fb050903b3d262001562c452be95eaf70; version=6.7

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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