CVE-2026-22985

Kernel crash via uninitialized idpf RSS LUT

Published Jan 23, 2026 · Updated Jan 23, 2026

A NULL pointer dereference in the Linux kernel idpf driver allows local users to crash the kernel via pre-interface RSS changes. Before initial interface activation, idpf_set_features passes the uninitialized RSS lookup table to a memory-copy operation when ethtool disables rxhash. The idpf driver must be loaded, the interface must never have been brought up, and the user must be able to change its network features; the resulting kernel oops interrupts system availability.

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

What happened

A NULL pointer dereference in the Linux kernel idpf driver allows local users to crash the kernel via pre-interface RSS changes. Before initial interface activation, idpf_set_features passes the uninitialized RSS lookup table to a memory-copy operation when ethtool disables rxhash. The idpf driver must be loaded, the interface must never have been brought up, and the user must be able to change its network features; the resulting kernel oops interrupts system availability.

The record

CVE
CVE-2026-22985
Published
Jan 23, 2026
Updated
Jan 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.7
  2. Affected versionversion=a251eee62133774cf35ff829041377e721ef9c8c <83f38f210b85676f40ba8586b5a8edae19b56995
  3. Affected versionversion=a251eee62133774cf35ff829041377e721ef9c8c <b29a5a7dd1f4293ee49c469938c25bf85a5aa802

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.7; version=a251eee62133774cf35ff829041377e721ef9c8c <83f38f210b85676f40ba8586b5a8edae19b56995; version=a251eee62133774cf35ff829041377e721ef9c8c <b29a5a7dd1f4293ee49c469938c25bf85a5aa802

Published CVSS scores

6.2Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.2Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS: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.

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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
Privilegesauthenticated
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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