CVE-2026-92481

Kernel disruption via stale interrupt handler

Published Sep 17, 2026 · Updated Sep 17, 2026

Use-after-free in Linux's MediaTek EINT driver allows local users to disrupt the kernel through driver unbind or module removal. mtk_eint_do_init() installs interrupt mappings and a chained handler without lifecycle cleanup, leaving the handler accessing freed driver data after teardown. The trigger requires an active affected MediaTek driver and high-privilege teardown access; the sources do not specify whether disruption manifests as a crash or hang.

CVSS severity4.4
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux's MediaTek EINT driver allows local users to disrupt the kernel through driver unbind or module removal. mtk_eint_do_init() installs interrupt mappings and a chained handler without lifecycle cleanup, leaving the handler accessing freed driver data after teardown. The trigger requires an active affected MediaTek driver and high-privilege teardown access; the sources do not specify whether disruption manifests as a crash or hang.

The record

CVE
CVE-2026-92481
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=4.18
  2. Affected versionversion=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <23252bc1cd9a58a039c9b1ae77b22d2b33da48e9
  3. Affected versionversion=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd
  4. Affected versionversion=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <7f6d898179ca4771ee602bdad4246c3952af83eb
  5. Affected versionversion=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <88292b7103d260e3e606eb3bb2794060a5fde48e
  6. Affected versionversion=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <903a7cdf63a81d3738594c5bd1b5955f58fda427
  7. Affected versionversion=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <e06785cba7f86d72abd531058b1a82d6952a7346

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.18; version=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <23252bc1cd9a58a039c9b1ae77b22d2b33da48e9; version=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd; version=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <7f6d898179ca4771ee602bdad4246c3952af83eb; version=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <88292b7103d260e3e606eb3bb2794060a5fde48e; version=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <903a7cdf63a81d3738594c5bd1b5955f58fda427; version=e46df235b4e605aa4e7609a27c118a1cccd4ff9a <e06785cba7f86d72abd531058b1a82d6952a7346

Published CVSS scores

4.4SUSECVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/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.

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 exploitUnconfirmed

Weakness, pattern, technique

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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