CVE-2024-26830

VF network disruption via unauthorized MAC removal

Published Apr 17, 2024 · Updated Aug 5, 2026

Improper access control in affected Linux i40e releases allows guest OS users to remove an administratively assigned virtual-function MAC. The i40e delete-MAC path accepts an untrusted VF's request when the PF set the primary address, removes that address from hardware filters, and zeros the VF's primary MAC. A guest OS user must control an untrusted SR-IOV VF and take it down; the resulting address loss can interrupt VF networking and defeat the PF's configured addressing policy.

CVSS severity6.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in affected Linux i40e releases allows guest OS users to remove an administratively assigned virtual-function MAC. The i40e delete-MAC path accepts an untrusted VF's request when the PF set the primary address, removes that address from hardware filters, and zeros the VF's primary MAC. A guest OS user must control an untrusted SR-IOV VF and take it down; the resulting address loss can interrupt VF networking and defeat the PF's configured addressing policy.

The record

CVE
CVE-2024-26830
Published
Apr 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=3.14
  2. Affected versionversion=700bbf6c1f9e4ab055528d5ab4ac5815fe4a6c1b <1c981792e4ccbc134b468797acdd7781959e6893
  3. Affected versionversion=700bbf6c1f9e4ab055528d5ab4ac5815fe4a6c1b <73d9629e1c8c1982f13688c4d1019c3994647ccc
  4. Affected versionversion=700bbf6c1f9e4ab055528d5ab4ac5815fe4a6c1b <be147926140ac48022c9605d7ab0a67387e4b404
  5. Affected versionversion=700bbf6c1f9e4ab055528d5ab4ac5815fe4a6c1b <d250a81ba813a93563be68072c563aa1e346346d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.14; version=700bbf6c1f9e4ab055528d5ab4ac5815fe4a6c1b <1c981792e4ccbc134b468797acdd7781959e6893; version=700bbf6c1f9e4ab055528d5ab4ac5815fe4a6c1b <73d9629e1c8c1982f13688c4d1019c3994647ccc; version=700bbf6c1f9e4ab055528d5ab4ac5815fe4a6c1b <be147926140ac48022c9605d7ab0a67387e4b404; version=700bbf6c1f9e4ab055528d5ab4ac5815fe4a6c1b <d250a81ba813a93563be68072c563aa1e346346d

Published CVSS scores

6.3NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
8.4kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/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

No sourced classifications are available.

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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