CVE-2026-68423

Memory corruption via premature MTD object free

Published Aug 10, 2026 · Updated Aug 10, 2026

Use-after-free in Linux kernel 7.1 through 7.1.5 and 7.2-rc1 through 7.2-rc3 allows local users to trigger an MTD stale-pointer access. In mtd_virt_concat_destroy(), mtd_concat_destroy() frees item->concat before mtd_virt_concat_put_mtd_devices() dereferences that object. Reachability requires high privileges and teardown of a virtual concatenated MTD device; public records identify low integrity and availability impact but no specific crash or data effect.

CVSS severity3.4
Low
EPSS probability0.14%
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 Linux kernel 7.1 through 7.1.5 and 7.2-rc1 through 7.2-rc3 allows local users to trigger an MTD stale-pointer access. In mtd_virt_concat_destroy(), mtd_concat_destroy() frees item->concat before mtd_virt_concat_put_mtd_devices() dereferences that object. Reachability requires high privileges and teardown of a virtual concatenated MTD device; public records identify low integrity and availability impact but no specific crash or data effect.

The record

CVE
CVE-2026-68423
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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?

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  1. Affected versionversion=43db6366fc2de02050e66389f5628d3fdc9af10a <4b45d7836b9526b8776af5f29219615be9417230
  2. Affected versionversion=43db6366fc2de02050e66389f5628d3fdc9af10a <d36520e5da8bf87265b334def0daaadf3603cc62
  3. Affected versionversion=7.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=43db6366fc2de02050e66389f5628d3fdc9af10a <4b45d7836b9526b8776af5f29219615be9417230; version=43db6366fc2de02050e66389f5628d3fdc9af10a <d36520e5da8bf87265b334def0daaadf3603cc62; version=7.1

Published CVSS scores

3.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L

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.

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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

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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