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VulnerabilityPublished Updated

CVE-2026-43094: Linux kernel · ixgbevf: add missing negotiate_features op to Hyper-V ops table

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in d8a747057a17ffc79e31df1abb11d05e1669d8e5 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:18 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch
Available – fixed in d8a747057a17ffc79e31df1abb11d05e1669d8e5, 4821d563cd7f251ae728be1a6d04af82a294a5b9, 2270ebab53128fb73c4a70a292be09094074737f +7

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=6.1.158 <6.1.175
  • >=6.6.114 <6.6.136
  • >=6.12.55 <6.12.83
  • >=6.17.5 <6.18
Fixed in
  • d8a747057a17ffc79e31df1abb11d05e1669d8e5
  • 4821d563cd7f251ae728be1a6d04af82a294a5b9
  • 2270ebab53128fb73c4a70a292be09094074737f
  • 1455ff8809843e6e83f1f5b5c0bcc2224c99a3cb
  • 376d74ea03589914fbe2dedcbebf418396c04fd0
  • 6.18
  • 6.12.83
  • 6.6.136
  • 6.1.175
  • 4db7b61ec1d1b2b67c0881b62fc4f9583bc21484
LinuxLinuxAffected
  • =6.18
Fixed in–

AI-suggested

Fixed versions are available and should be applied. The vulnerability is resolved by updates that add the missing .negotiate_features callback to the Hyper-V operations table in the ixgbevf driver. Users should upgrade to Linux kernel versions 6.1.175, 6.6.136, 6.12.83, 6.18, or later as appropriate.

Description

A NULL pointer dereference vulnerability was identified in the Linux kernel's ixgbevf driver on Hyper-V virtual machines. The issue was caused by a missing .negotiate_features callback in the Hyper-V operations table, leading to a kernel crash during device probe. This flaw has been fixed by adding the missing callback that gracefully handles unsupported operations.

References

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