CVE-2026-98184Hinoki check available

Kernel heap overwrite via authentication length truncation

Published Oct 6, 2026 · Updated Oct 6, 2026

Heap buffer overflow in the mwifiex Wi-Fi driver in Linux 6.12 allows local users to overwrite kernel heap memory during authentication. The mwifiex_cfg80211_authenticate() function truncates a combined authentication-frame length to 16 bits before allocating frame space, then copies the untruncated user-supplied authentication data into it. Reaching the path requires CAP_NET_ADMIN in the owning user namespace, an active station interface, and a suitable BSS/SAE authentication request; the record establishes memory corruption but not a specific escalation or code-execution outcome.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Heap buffer overflow in the mwifiex Wi-Fi driver in Linux 6.12 allows local users to overwrite kernel heap memory during authentication. The mwifiex_cfg80211_authenticate() function truncates a combined authentication-frame length to 16 bits before allocating frame space, then copies the untruncated user-supplied authentication data into it. Reaching the path requires CAP_NET_ADMIN in the owning user namespace, an active station interface, and a suitable BSS/SAE authentication request; the record establishes memory corruption but not a specific escalation or code-execution outcome.

The record

CVE
CVE-2026-98184
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 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?

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  1. Affected versionversion=36995892c271cce5e2230bc165a06f109b117222 <25c45a2075cc00faed45f92a64bb172fb074a2ee
  2. Affected versionversion=36995892c271cce5e2230bc165a06f109b117222 <5747eaa38a7fcad48be2fd910b65008198b2b06c
  3. Affected versionversion=36995892c271cce5e2230bc165a06f109b117222 <877b61a67d5eb3e616478daf3908114b57feff1e
  4. Affected versionversion=36995892c271cce5e2230bc165a06f109b117222 <fa00193eb991f92b007aefe7afb6a7566976dacf
  5. Affected versionversion=6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=36995892c271cce5e2230bc165a06f109b117222 <25c45a2075cc00faed45f92a64bb172fb074a2ee; version=36995892c271cce5e2230bc165a06f109b117222 <5747eaa38a7fcad48be2fd910b65008198b2b06c; version=36995892c271cce5e2230bc165a06f109b117222 <877b61a67d5eb3e616478daf3908114b57feff1e; version=36995892c271cce5e2230bc165a06f109b117222 <fa00193eb991f92b007aefe7afb6a7566976dacf; version=6.12

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
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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