CVE-2026-99151

Kernel crash via unchecked USB4 display sink

Published Oct 28, 2026 · Updated Oct 28, 2026

NULL dereference in Linux AMD display USB4 bandwidth handling allows attackers to crash the kernel via a missing sink. allocate_usb4_bandwidth_for_stream() and allocate_usb4_bandwidth() access stream->sink->link after assertions that production builds omit; link_set_dpms_off() also calls bandwidth deallocation without checking the sink. The fault requires the affected display path to encounter a NULL sink; attacker control and required privileges are not documented, and system-wide interruption depends on kernel fault handling.

CVSS severityUnavailable

Unscored

EPSS probability0.16%

Next 30 days · Nov 1, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

Coverage for this vulnerability

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Summary

What happened

The record

CVE: CVE-2026-99151
Published: Oct 28, 2026
Updated: Oct 28, 2026

Vendor: The Linux Kernel Organization
Product: Linux
Classifications: Unavailable

Attack vector: Unavailable
Privileges: Unavailable

Timeline

How it unfolded

Oct 28, 2026CVE publishedPublication date reported by the CVE source.
Oct 28, 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.

Affected versionversion=0b1eebd359685dd681f6e0df5540a5bb985a27bf <4c8b5e5b9776ad08138d79b14238c5742b32911b
Affected versionversion=7.2.9 <7.2.13
Affected versionversion=8fa813b7fd1eccbed13e126166cf764f1f11a7d3 <55a67aa89342545b89f469dea6f29bfb6fac6f3d

What conditions does exploitation require?

Attack vectorUnavailable in this record.

Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0b1eebd359685dd681f6e0df5540a5bb985a27bf <4c8b5e5b9776ad08138d79b14238c5742b32911b; version=7.2.9 <7.2.13; version=8fa813b7fd1eccbed13e126166cf764f1f11a7d3 <55a67aa89342545b89f469dea6f29bfb6fac6f3d

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.

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)

VectorUnavailable

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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