CVE-2026-93234Public exploitHinoki check available

System crash via unterminated GUD mode name

Published Sep 24, 2026 · Updated Sep 24, 2026

Out-of-bounds read in the Linux kernel GUD driver allows physically proximate attackers to crash a system via a malformed USB display. The gud_connector_add_tv_mode() function passes fixed-size device-supplied mode names to strlen() without first ensuring that each slot contains a NUL terminator. Triggering occurs during USB device probing and requires a malicious or noncompliant GUD peripheral; the demonstrated consequence is denial of service.

CVSS severityUnavailable
Unscored
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 read in the Linux kernel GUD driver allows physically proximate attackers to crash a system via a malformed USB display. The gud_connector_add_tv_mode() function passes fixed-size device-supplied mode names to strlen() without first ensuring that each slot contains a NUL terminator. Triggering occurs during USB device probing and requires a malicious or noncompliant GUD peripheral; the demonstrated consequence is denial of service.

The record

CVE
CVE-2026-93234
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 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=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <06fcaf21c18ac88f57fee3803554f48c6026b95f
  2. Affected versionversion=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <082e378886547b5b1c4075ed307f7c68547868dc
  3. Affected versionversion=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <676f1fb3632bbc9ce83be7938e93fe6bfc9510fd
  4. Affected versionversion=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <70cffc31a380b3eae45027101647aa94c242aa0e
  5. Affected versionversion=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <72a95df6bbc7d20c7af1e39d86b3e910cccd01ad
  6. Affected versionversion=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <da1ea35fea67ad841f4ada28dd61b41be65e5437
  7. Affected versionversion=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <eab46d9629807db1b5647d17227e16110a18227f
  8. Affected versionversion=5.13

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <06fcaf21c18ac88f57fee3803554f48c6026b95f; version=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <082e378886547b5b1c4075ed307f7c68547868dc; version=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <676f1fb3632bbc9ce83be7938e93fe6bfc9510fd; version=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <70cffc31a380b3eae45027101647aa94c242aa0e; version=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <72a95df6bbc7d20c7af1e39d86b3e910cccd01ad; version=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <da1ea35fea67ad841f4ada28dd61b41be65e5437; version=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <eab46d9629807db1b5647d17227e16110a18227f; version=5.13

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.

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

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1200Hardware Additions

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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