CVE-2026-53024

Kernel panic via post-disconnect Greybus write

Published Jun 24, 2026 · Updated Jun 24, 2026

Use-after-free in the Linux Kernel Greybus raw driver 4.9 through 7.0.9 allows local users to trigger a kernel panic via a post-disconnect write. Disconnect frees the gb_connection object, but raw_write later passes that freed pointer to gb_operation_sync without synchronization. Access to the Greybus raw character device and a disconnect while it remains open are required; the demonstrated consequence is a system crash.

CVSS severity7.8
High
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 Greybus raw driver 4.9 through 7.0.9 allows local users to trigger a kernel panic via a post-disconnect write. Disconnect frees the gb_connection object, but raw_write later passes that freed pointer to gb_operation_sync without synchronization. Access to the Greybus raw character device and a disconnect while it remains open are required; the demonstrated consequence is a system crash.

The record

CVE
CVE-2026-53024
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=4.9
  2. Affected versionversion=e806c7fb8e9bae87fc23958c3789f2c2f96f54a4 <48d6c32bc049abd114e8f0836c0e7d7cbfba7827
  3. Affected versionversion=e806c7fb8e9bae87fc23958c3789f2c2f96f54a4 <84265cbd96b97058ef67e3f8be3933667a000835

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.9; version=e806c7fb8e9bae87fc23958c3789f2c2f96f54a4 <48d6c32bc049abd114e8f0836c0e7d7cbfba7827; version=e806c7fb8e9bae87fc23958c3789f2c2f96f54a4 <84265cbd96b97058ef67e3f8be3933667a000835

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Endpoint Denial of Service: Application 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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