VulnerabilityPublished 18 Oct 2026

CVE-2026-98565: Linux kernel · net: dsa: mt7530: fix NULL dereference on unbind of MT7531 and MT7621

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e9a5298532780ecdd05c3220f3e1e3067b3537c3 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e9a5298532780ecdd05c3220f3e1e3067b3537c3, c2cdef41e0b4d8ed23a5b41e6ad4e64594e055e4, bd172580e624bac00d83abd5c4320d2e14d853bc +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ ddda1ac116c852bb969541ed53cffef7255c4961, < e9a5298532780ecdd05c3220f3e1e3067b3537c3	Fixed in e9a5298532780ecdd05c3220f3e1e3067b3537c3
LinuxLinux	Affected ≥ ddda1ac116c852bb969541ed53cffef7255c4961, < c2cdef41e0b4d8ed23a5b41e6ad4e64594e055e4	Fixed in c2cdef41e0b4d8ed23a5b41e6ad4e64594e055e4
LinuxLinux	Affected ≥ ddda1ac116c852bb969541ed53cffef7255c4961, < bd172580e624bac00d83abd5c4320d2e14d853bc	Fixed in bd172580e624bac00d83abd5c4320d2e14d853bc
LinuxLinux	Affected ≥ ddda1ac116c852bb969541ed53cffef7255c4961, < aae2a1f1e3a0ac5eeb439262a2328a2a392413ac	Fixed in aae2a1f1e3a0ac5eeb439262a2328a2a392413ac
LinuxLinux	Affected ≥ ddda1ac116c852bb969541ed53cffef7255c4961, < 62c0e38b2e5034184d4502ce77bd178b29e59b83	Fixed in 62c0e38b2e5034184d4502ce77bd178b29e59b83
LinuxLinux	Affected =5.1	Fixed in–

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AI-suggested

A fix is available in the Linux kernel as indicated by the fixed commit versions. Users should update to a Linux kernel version that includes the patches identified by the fixed commit hashes to resolve this issue. No additional mitigation is required beyond applying the official fix.

Description

A NULL pointer dereference vulnerability was fixed in the Linux kernel's DSA mt7530 driver affecting MT7531 and MT7621 devices. The issue occurs because regulator pointers remain NULL on these devices, leading to an unconditional call to regulator_disable() on NULL during module removal or sysfs unbind. This flaw could cause kernel crashes or instability when the affected driver is unloaded.

Impact

This vulnerability can lead to kernel crashes or instability due to NULL pointer dereference when the mt7530 driver is removed or unbound on MT7531 and MT7621 devices. There is no indication of remote exploitation or privilege escalation, but system reliability is affected during driver unload.

Summary

The Linux kernel's net: dsa: mt7530 driver had a NULL dereference vulnerability triggered on unbind of MT7531 and MT7621 devices. The core and IO regulator supplies are only requested for ID_MT7530, with devm_regulator_get() and regulator_enable() guarded by the switch ID. However, mt7530_remove() disables regulators unconditionally, causing regulator_disable() to be called on NULL pointers for MT7531 and MT7621, which were never initialized. This flaw was addressed by correcting the unconditional disable calls to prevent NULL dereference.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 10:38 UTC

Technical details

References

Community reviews

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