CVE-2026-64421

Invalid kernel-memory read via reversed cleanup order

Published Jul 25, 2026 · Updated Jul 25, 2026

Use-after-free in the Linux Kernel imx8-isi driver allows local users to trigger an invalid kernel-memory read during driver removal. The mxc_isi_remove() routine frees media-entity pads in crossbar cleanup before V4L2 cleanup removes links that still reference them. Local administrative privilege, supported NXP hardware, and a kernel containing the driver are required; the demonstrated result is a KASAN-detected slab use-after-free.

CVSS severity6.7
Medium
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 imx8-isi driver allows local users to trigger an invalid kernel-memory read during driver removal. The mxc_isi_remove() routine frees media-entity pads in crossbar cleanup before V4L2 cleanup removes links that still reference them. Local administrative privilege, supported NXP hardware, and a kernel containing the driver are required; the demonstrated result is a KASAN-detected slab use-after-free.

The record

CVE
CVE-2026-64421
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=6.4
  2. Affected versionversion=cf21f328fcafacf4f96e7a30ef9dceede1076378 <b670bf89824ede5d07d20bb9bfbafb754846081d
  3. Affected versionversion=cf21f328fcafacf4f96e7a30ef9dceede1076378 <ba2aa5d325270cd965c44458c5ff5ab555e6af51
  4. Affected versionversion=cf21f328fcafacf4f96e7a30ef9dceede1076378 <c12a5b2261351cd3b03921ce4720332ff5184b50
  5. Affected versionversion=cf21f328fcafacf4f96e7a30ef9dceede1076378 <d22fb719654bfde6f682c9f14629f5f9534175b7
  6. Affected versionversion=cf21f328fcafacf4f96e7a30ef9dceede1076378 <ef382a6baf0a95cf199fdf6bba2fd08e58b0a249

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.4; version=cf21f328fcafacf4f96e7a30ef9dceede1076378 <b670bf89824ede5d07d20bb9bfbafb754846081d; version=cf21f328fcafacf4f96e7a30ef9dceede1076378 <ba2aa5d325270cd965c44458c5ff5ab555e6af51; version=cf21f328fcafacf4f96e7a30ef9dceede1076378 <c12a5b2261351cd3b03921ce4720332ff5184b50; version=cf21f328fcafacf4f96e7a30ef9dceede1076378 <d22fb719654bfde6f682c9f14629f5f9534175b7; version=cf21f328fcafacf4f96e7a30ef9dceede1076378 <ef382a6baf0a95cf199fdf6bba2fd08e58b0a249

Published CVSS scores

6.7Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/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 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

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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