CVE-2026-90022Public exploit

Kernel crash via unlocked MIDI string dereference

Published Sep 16, 2026 · Updated Sep 16, 2026

Use-after-free in affected Linux kernel branches allows local users to crash the kernel through concurrent f_midi2 configfs access. The show callers dereference interface, block-name, and endpoint-string pointers before opts->lock is held, while a concurrent store frees the old string under that lock. Triggering the race requires privileged configfs access and concurrent reads and writes; the demonstrated consequence is a kernel crash.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in affected Linux kernel branches allows local users to crash the kernel through concurrent f_midi2 configfs access. The show callers dereference interface, block-name, and endpoint-string pointers before opts->lock is held, while a concurrent store frees the old string under that lock. Triggering the race requires privileged configfs access and concurrent reads and writes; the demonstrated consequence is a kernel crash.

The record

CVE
CVE-2026-90022
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=0 <6.12.110
  2. Affected versionversion=0 <6.18.51
  3. Affected versionversion=0 <6.6.157
  4. Affected versionversion=0 <7.2.5
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <49fab5e1bdb205c36c965d0e9677bc40d282d3a2
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d11f3300b39e2daad2f0d9d66ddcc39a156cb594
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e89e30f0b5d3004fe5955250bd8b04f3733e32ce
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f9bdf4c4f6410a1dfafafa383a0e21069372657f
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fed0aa7c6eaedc6c0d4e362fc91724aa47be4a7b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=0 <6.12.110; version=0 <6.18.51; version=0 <6.6.157; version=0 <7.2.5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <49fab5e1bdb205c36c965d0e9677bc40d282d3a2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d11f3300b39e2daad2f0d9d66ddcc39a156cb594; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e89e30f0b5d3004fe5955250bd8b04f3733e32ce; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f9bdf4c4f6410a1dfafafa383a0e21069372657f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fed0aa7c6eaedc6c0d4e362fc91724aa47be4a7b

Published CVSS scores

No CVSS assessment is available in this record.

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

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

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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