CVE-2026-43094

Guest crash via missing ixgbevf Hyper-V callback

Published May 6, 2026 · Updated May 6, 2026

NULL pointer dereference in the ixgbevf driver in Linux Kernel allows local users to crash Hyper-V guests during device probe. The ixgbevf Hyper-V operations table leaves negotiate_features NULL, while ixgbevf_set_features unconditionally calls that callback during device initialization. Reachability requires a vulnerable kernel in a Hyper-V guest using the ixgbevf virtual-function driver; the resulting kernel fault interrupts that guest.

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

NULL pointer dereference in the ixgbevf driver in Linux Kernel allows local users to crash Hyper-V guests during device probe. The ixgbevf Hyper-V operations table leaves negotiate_features NULL, while ixgbevf_set_features unconditionally calls that callback during device initialization. Reachability requires a vulnerable kernel in a Hyper-V guest using the ixgbevf virtual-function driver; the resulting kernel fault interrupts that guest.

The record

CVE
CVE-2026-43094
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=2e0aab9ddaf1428602c78f12064cd1e6ffcc4d18 <d8a747057a17ffc79e31df1abb11d05e1669d8e5
  2. Affected versionversion=6.18
  3. Affected versionversion=871ac1cd4ce4804defcb428cbb003fd84c415ff4
  4. Affected versionversion=a376e29b1b196dc90b50df7e5e3947e3026300c4
  5. Affected versionversion=a7075f501bd33c93570af759b6f4302ef0175168 <1455ff8809843e6e83f1f5b5c0bcc2224c99a3cb
  6. Affected versionversion=a7075f501bd33c93570af759b6f4302ef0175168 <4821d563cd7f251ae728be1a6d04af82a294a5b9
  7. Affected versionversion=a7075f501bd33c93570af759b6f4302ef0175168 <4db7b61ec1d1b2b67c0881b62fc4f9583bc21484
  8. Affected versionversion=bf580112ed61736c2645a893413a04732505d4b1 <2270ebab53128fb73c4a70a292be09094074737f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2e0aab9ddaf1428602c78f12064cd1e6ffcc4d18 <d8a747057a17ffc79e31df1abb11d05e1669d8e5; version=6.18; version=871ac1cd4ce4804defcb428cbb003fd84c415ff4; version=a376e29b1b196dc90b50df7e5e3947e3026300c4; version=a7075f501bd33c93570af759b6f4302ef0175168 <1455ff8809843e6e83f1f5b5c0bcc2224c99a3cb; version=a7075f501bd33c93570af759b6f4302ef0175168 <4821d563cd7f251ae728be1a6d04af82a294a5b9; version=a7075f501bd33c93570af759b6f4302ef0175168 <4db7b61ec1d1b2b67c0881b62fc4f9583bc21484; version=bf580112ed61736c2645a893413a04732505d4b1 <2270ebab53128fb73c4a70a292be09094074737f

Published CVSS scores

5.5NIST NVDCVSS: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 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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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