CVE-2026-98008Hinoki check available

Kernel crash via NULL MDIO bus cleanup

Published Sep 25, 2026 · Updated Sep 25, 2026

NULL pointer dereference in the Linux macb driver allows attackers to crash the kernel during fixed-link device cleanup. macb_mii_init leaves bp->mii_bus NULL when a fixed-link device tree has no mdio child, but macb_remove and probe-error cleanup still pass it to MDIO teardown functions. The kernel oops requires that hardware description and either driver unbind or a later probe failure, so ordinary network traffic does not reach the flaw.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

NULL pointer dereference in the Linux macb driver allows attackers to crash the kernel during fixed-link device cleanup. macb_mii_init leaves bp->mii_bus NULL when a fixed-link device tree has no mdio child, but macb_remove and probe-error cleanup still pass it to MDIO teardown functions. The kernel oops requires that hardware description and either driver unbind or a later probe failure, so ordinary network traffic does not reach the flaw.

The record

CVE
CVE-2026-98008
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=19088c5378c9fea54e552d8bc7418a3aa1e06990
  2. Affected versionversion=5.10.228 <5.11
  3. Affected versionversion=5.15.169 <5.16
  4. Affected versionversion=6.1.114 <6.2
  5. Affected versionversion=6.11.5 <6.12
  6. Affected versionversion=6.12
  7. Affected versionversion=6.6.58 <6.7
  8. Affected versionversion=81db1e52848694761a1aa162ce76198af9964ed8
  9. Affected versionversion=831e19e565b5210930fa183730071f8290c61263
  10. Affected versionversion=c81dcaa9cd0b66816c2ecb6c5df0b6afde9c7da5
  11. Affected versionversion=cafa5942bd2df3d80e3eeb2deb4bc050f7761f3d
  12. Affected versionversion=d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 <38b6be101006d3e7af972999f45d4f1e8250587a
  13. Affected versionversion=d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 <5710f6a74f63cbba0e15cd75917234916181c9d4
  14. Affected versionversion=d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 <edb39c7666bb3924da761dfb417db85c1e5d8ad3
  15. Affected versionversion=d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 <f737d999fcb8f276d77b01ea4c2016ee01dad19b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=19088c5378c9fea54e552d8bc7418a3aa1e06990; version=5.10.228 <5.11; version=5.15.169 <5.16; version=6.1.114 <6.2; version=6.11.5 <6.12; version=6.12; version=6.6.58 <6.7; version=81db1e52848694761a1aa162ce76198af9964ed8; version=831e19e565b5210930fa183730071f8290c61263; version=c81dcaa9cd0b66816c2ecb6c5df0b6afde9c7da5; version=cafa5942bd2df3d80e3eeb2deb4bc050f7761f3d; version=d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 <38b6be101006d3e7af972999f45d4f1e8250587a; version=d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 <5710f6a74f63cbba0e15cd75917234916181c9d4; version=d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 <edb39c7666bb3924da761dfb417db85c1e5d8ad3; version=d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 <f737d999fcb8f276d77b01ea4c2016ee01dad19b

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started