CVE-2026-93120Hinoki check available

Kernel-data disclosure via incorrect UTF-16 conversion length

Published Sep 17, 2026 · Updated Sep 17, 2026

Out-of-bounds reading in Linux USB gadget configfs allows local users to read adjacent kernel data through the qw_sign attribute. The os_desc_qw_sign_show() function treats the signature's 14-byte size as 14 UTF-16 code units instead of seven, exposing up to 14 bytes from following gadget_info members. Disclosure requires access to an existing gadget's configfs attribute and a stored signature that fills the array without a NUL terminator; setting that signature requires write access.

CVSS severity2.3
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds reading in Linux USB gadget configfs allows local users to read adjacent kernel data through the qw_sign attribute. The os_desc_qw_sign_show() function treats the signature's 14-byte size as 14 UTF-16 code units instead of seven, exposing up to 14 bytes from following gadget_info members. Disclosure requires access to an existing gadget's configfs attribute and a stored signature that fills the array without a NUL terminator; setting that signature requires write access.

The record

CVE
CVE-2026-93120
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=4.13
  2. Affected versionversion=76180d716f91f035d9c8639497cf5459b44e1a51 <36315a330e067f7773196940552feacb1debbef1
  3. Affected versionversion=76180d716f91f035d9c8639497cf5459b44e1a51 <7e94cb967778e074411940db4db97f22ed77560c
  4. Affected versionversion=76180d716f91f035d9c8639497cf5459b44e1a51 <9b45125501aad2dff7730970461b455b0e0658ee
  5. Affected versionversion=76180d716f91f035d9c8639497cf5459b44e1a51 <a28c486434634f6d1e120711d2b09f3eddea6c98
  6. Affected versionversion=76180d716f91f035d9c8639497cf5459b44e1a51 <afbf39c0f2297c6abef6d670a82a2079b0836191
  7. Affected versionversion=76180d716f91f035d9c8639497cf5459b44e1a51 <b895dbed8ac9e12a5ffa1a2165575a8469f8340d
  8. Affected versionversion=76180d716f91f035d9c8639497cf5459b44e1a51 <f63edb54d8f738f9c21e2068c777ae1c097df6b7
  9. Affected versionversion=76180d716f91f035d9c8639497cf5459b44e1a51 <f6da500b0f8106882598b6dec87fe37d653946cf

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.13; version=76180d716f91f035d9c8639497cf5459b44e1a51 <36315a330e067f7773196940552feacb1debbef1; version=76180d716f91f035d9c8639497cf5459b44e1a51 <7e94cb967778e074411940db4db97f22ed77560c; version=76180d716f91f035d9c8639497cf5459b44e1a51 <9b45125501aad2dff7730970461b455b0e0658ee; version=76180d716f91f035d9c8639497cf5459b44e1a51 <a28c486434634f6d1e120711d2b09f3eddea6c98; version=76180d716f91f035d9c8639497cf5459b44e1a51 <afbf39c0f2297c6abef6d670a82a2079b0836191; version=76180d716f91f035d9c8639497cf5459b44e1a51 <b895dbed8ac9e12a5ffa1a2165575a8469f8340d; version=76180d716f91f035d9c8639497cf5459b44e1a51 <f63edb54d8f738f9c21e2068c777ae1c097df6b7; version=76180d716f91f035d9c8639497cf5459b44e1a51 <f6da500b0f8106882598b6dec87fe37d653946cf

Published CVSS scores

2.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
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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