CVE-2026-90023Public exploitHinoki check available

Kernel crash via invalid gadget buffer count

Published Sep 16, 2026 · Updated Sep 16, 2026

Null pointer dereference in the Linux USB mass-storage gadget allows local users to crash the kernel by writing zero to num_buffers. The configfs store path parses page content with kstrtou8() and passes values below the Kconfig minimum to fsg_common_set_num_buffers(), where zero leaves no buffer object for cyclic-list setup. Reachability requires local write access to the USB gadget configuration interface; the demonstrated outcome is a kernel general-protection fault.

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

What happened

Null pointer dereference in the Linux USB mass-storage gadget allows local users to crash the kernel by writing zero to num_buffers. The configfs store path parses page content with kstrtou8() and passes values below the Kconfig minimum to fsg_common_set_num_buffers(), where zero leaves no buffer object for cyclic-list setup. Reachability requires local write access to the USB gadget configuration interface; the demonstrated outcome is a kernel general-protection fault.

The record

CVE
CVE-2026-90023
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
Unavailable

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

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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=4.8
  2. Affected versionversion=fe5a6c48fd954489f51aab151d5dad9254c76419 <2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc
  3. Affected versionversion=fe5a6c48fd954489f51aab151d5dad9254c76419 <9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957
  4. Affected versionversion=fe5a6c48fd954489f51aab151d5dad9254c76419 <b9b5b5df5b8dd3c1572ed267200276a44cc67d8e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=fe5a6c48fd954489f51aab151d5dad9254c76419 <2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc; version=fe5a6c48fd954489f51aab151d5dad9254c76419 <9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957; version=fe5a6c48fd954489f51aab151d5dad9254c76419 <b9b5b5df5b8dd3c1572ed267200276a44cc67d8e

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
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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