CVE-2026-98311Public exploit

Local kernel crash via premature operstate transfer

Published Oct 6, 2026 · Updated Oct 6, 2026

Use-after-free in the Linux virt_wifi driver allows local users to crash the kernel by creating a virtual Wi-Fi link over a dormant device. virt_wifi_newlink transfers operstate before registering the new device, leaving it on lweventlist when failed registration frees it; linkwatch_fire_event later accesses the freed entry. The trigger requires access to user and network namespaces, a dormant lower device, and a failed link registration.

CVSS severityUnavailable
Unscored
EPSS probability0.14%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Use-after-free in the Linux virt_wifi driver allows local users to crash the kernel by creating a virtual Wi-Fi link over a dormant device. virt_wifi_newlink transfers operstate before registering the new device, leaving it on lweventlist when failed registration frees it; linkwatch_fire_event later accesses the freed entry. The trigger requires access to user and network namespaces, a dormant lower device, and a failed link registration.

The record

CVE
CVE-2026-98311
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
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

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=5.0
  2. Affected versionversion=c7cdba31ed8b87526db978976392802d3f93110c <293c56a66510bb7de073a1aba388e38abddff1fb
  3. Affected versionversion=c7cdba31ed8b87526db978976392802d3f93110c <9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225
  4. Affected versionversion=c7cdba31ed8b87526db978976392802d3f93110c <b808a9af5fd21f9c68b0d024eda7535b5dce6a4e
  5. Affected versionversion=c7cdba31ed8b87526db978976392802d3f93110c <ca49763c42c1089d654bf11b037980a9ede3772c
  6. Affected versionversion=c7cdba31ed8b87526db978976392802d3f93110c <e5c8d7acd31b27057ea42cd405d0b3ece097bc89
  7. Affected versionversion=c7cdba31ed8b87526db978976392802d3f93110c <e8304e25c6dabb8accf38b807969438d0ce84fd7
  8. Affected versionversion=c7cdba31ed8b87526db978976392802d3f93110c <ee9ea1afd6990def51d52b3a0aecd5cfcc951da0
  9. Affected versionversion=c7cdba31ed8b87526db978976392802d3f93110c <f9526054c2b2cace5916b7225603d008834ec011

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.0; version=c7cdba31ed8b87526db978976392802d3f93110c <293c56a66510bb7de073a1aba388e38abddff1fb; version=c7cdba31ed8b87526db978976392802d3f93110c <9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225; version=c7cdba31ed8b87526db978976392802d3f93110c <b808a9af5fd21f9c68b0d024eda7535b5dce6a4e; version=c7cdba31ed8b87526db978976392802d3f93110c <ca49763c42c1089d654bf11b037980a9ede3772c; version=c7cdba31ed8b87526db978976392802d3f93110c <e5c8d7acd31b27057ea42cd405d0b3ece097bc89; version=c7cdba31ed8b87526db978976392802d3f93110c <e8304e25c6dabb8accf38b807969438d0ce84fd7; version=c7cdba31ed8b87526db978976392802d3f93110c <ee9ea1afd6990def51d52b3a0aecd5cfcc951da0; version=c7cdba31ed8b87526db978976392802d3f93110c <f9526054c2b2cace5916b7225603d008834ec011

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 exploitPublished

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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