CVE-2026-46246

Local system crash via extcon teardown race

Published Jun 3, 2026 · Updated Jun 3, 2026

Use-after-free in the Linux Kernel pm8916_lbc driver allows local users to crash the system during device removal. The driver requests its IRQ before registering the extcon handle, so reverse devm cleanup frees that handle before IRQ unregistration and extcon_set_state_sync() can receive a dangling pointer. Exploitation requires local low-privileged access, device removal, and an interrupt in the teardown window; documented outcomes are a kernel crash or silent memory corruption.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Kernel pm8916_lbc driver allows local users to crash the system during device removal. The driver requests its IRQ before registering the extcon handle, so reverse devm cleanup frees that handle before IRQ unregistration and extcon_set_state_sync() can receive a dangling pointer. Exploitation requires local low-privileged access, device removal, and an interrupt in the teardown window; documented outcomes are a kernel crash or silent memory corruption.

The record

CVE
CVE-2026-46246
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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=6.7
  2. Affected versionversion=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <23067259919663580c6f81801847cfc7bd54fd1f
  3. Affected versionversion=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <47abfc207ab02cf1297257e282e8048da63f0d08
  4. Affected versionversion=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <48e0f68b50c344bb2d78d65dd98f93e41276ee00
  5. Affected versionversion=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <9fab0120907e6965168e55b1e17cb9dfaf262b86

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.7; version=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <23067259919663580c6f81801847cfc7bd54fd1f; version=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <47abfc207ab02cf1297257e282e8048da63f0d08; version=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <48e0f68b50c344bb2d78d65dd98f93e41276ee00; version=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <9fab0120907e6965168e55b1e17cb9dfaf262b86

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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

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Your stack

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