CVE-2026-98565Public exploit

Crash via unchecked regulator disable during unbind

Published Oct 18, 2026 · Updated Oct 18, 2026

NULL dereference in Linux's mt7530 MDIO driver allows local users to crash the calling task through privileged driver unbinding. mt7530_remove() disables core and I/O regulators even though their pointers remain NULL on MT7531 and MT7621 switches. Triggering requires driver-removal privileges and regulator support; panic-on-oops configuration turns the task crash into a kernel panic and reboot.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL dereference in Linux's mt7530 MDIO driver allows local users to crash the calling task through privileged driver unbinding. mt7530_remove() disables core and I/O regulators even though their pointers remain NULL on MT7531 and MT7621 switches. Triggering requires driver-removal privileges and regulator support; panic-on-oops configuration turns the task crash into a kernel panic and reboot.

The record

CVE
CVE-2026-98565
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 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=5.1
  2. Affected versionversion=ddda1ac116c852bb969541ed53cffef7255c4961 <62c0e38b2e5034184d4502ce77bd178b29e59b83
  3. Affected versionversion=ddda1ac116c852bb969541ed53cffef7255c4961 <aae2a1f1e3a0ac5eeb439262a2328a2a392413ac
  4. Affected versionversion=ddda1ac116c852bb969541ed53cffef7255c4961 <bd172580e624bac00d83abd5c4320d2e14d853bc
  5. Affected versionversion=ddda1ac116c852bb969541ed53cffef7255c4961 <c2cdef41e0b4d8ed23a5b41e6ad4e64594e055e4
  6. Affected versionversion=ddda1ac116c852bb969541ed53cffef7255c4961 <e9a5298532780ecdd05c3220f3e1e3067b3537c3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=ddda1ac116c852bb969541ed53cffef7255c4961 <62c0e38b2e5034184d4502ce77bd178b29e59b83; version=ddda1ac116c852bb969541ed53cffef7255c4961 <aae2a1f1e3a0ac5eeb439262a2328a2a392413ac; version=ddda1ac116c852bb969541ed53cffef7255c4961 <bd172580e624bac00d83abd5c4320d2e14d853bc; version=ddda1ac116c852bb969541ed53cffef7255c4961 <c2cdef41e0b4d8ed23a5b41e6ad4e64594e055e4; version=ddda1ac116c852bb969541ed53cffef7255c4961 <e9a5298532780ecdd05c3220f3e1e3067b3537c3

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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

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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