CVE-2024-26892

Kernel crash via post-deregistration interrupt handling

Published Apr 17, 2024 · Updated May 23, 2026

Use-after-free in the mt7921e Wi-Fi driver in Linux allows local users to crash the kernel during PCI device removal. During mt7921_pci_remove, free_irq can invoke the shared mt7921_irq_handler after deregistration, and the handler reads freed device resources because removal state is not marked. Reaching the flaw requires administrative ability to remove the PCI driver while an unexpected shared interrupt is handled; the demonstrated consequence is a KASAN-detected kernel memory access that can crash the system.

CVSS severity7.8
High
EPSS probability0.23%
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 mt7921e Wi-Fi driver in Linux allows local users to crash the kernel during PCI device removal. During mt7921_pci_remove, free_irq can invoke the shared mt7921_irq_handler after deregistration, and the handler reads freed device resources because removal state is not marked. Reaching the flaw requires administrative ability to remove the PCI driver while an unexpected shared interrupt is handled; the demonstrated consequence is a KASAN-detected kernel memory access that can crash the system.

The record

CVE
CVE-2024-26892
Published
Apr 17, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=6.2.15 <6.3
  2. Affected versionversion=6.3.2 <6.4
  3. Affected versionversion=6.4
  4. Affected versionversion=9270270d62191b7549296721e8d5f3dc0df01563 <bfe1adf1606f76c180324e53b130f0e76d5cc6c3
  5. Affected versionversion=9270270d62191b7549296721e8d5f3dc0df01563 <bfeaef901194c5923ce3330272786eff2fac513a
  6. Affected versionversion=9270270d62191b7549296721e8d5f3dc0df01563 <c7dd42fbebcfb02bef070fd48f774d6412d0b49d
  7. Affected versionversion=9270270d62191b7549296721e8d5f3dc0df01563 <c957280ef6ab6bdf559a91ae693a6b34310697e3
  8. Affected versionversion=95e41ac30a0d0b3637f0b3c93235a7a107a2fb7f
  9. Affected versionversion=a76eaaaafd8b408238d7865bbbbd311f08988f3d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.2.15 <6.3; version=6.3.2 <6.4; version=6.4; version=9270270d62191b7549296721e8d5f3dc0df01563 <bfe1adf1606f76c180324e53b130f0e76d5cc6c3; version=9270270d62191b7549296721e8d5f3dc0df01563 <bfeaef901194c5923ce3330272786eff2fac513a; version=9270270d62191b7549296721e8d5f3dc0df01563 <c7dd42fbebcfb02bef070fd48f774d6412d0b49d; version=9270270d62191b7549296721e8d5f3dc0df01563 <c957280ef6ab6bdf559a91ae693a6b34310697e3; version=95e41ac30a0d0b3637f0b3c93235a7a107a2fb7f; version=a76eaaaafd8b408238d7865bbbbd311f08988f3d

Published CVSS scores

4.4OracleCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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Your stack

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