CVE-2026-72313

Local service interruption via inactive CRTC wait

Published Aug 15, 2026 · Updated Aug 15, 2026

Denial of service in Linux 6.19 allows local users to interrupt display updates by triggering fbdev synchronization on an inactive CRTC. The drm_fb_helper_damage_work path waits for CRTC 0 vblank instead of locating the active CRTC carrying fbdev output, so the wait times out. Local low-privileged access and an fbdev layout whose output is not on CRTC 0 are required; the reported effect is delayed or unresponsive display updates.

CVSS severity3.3
Low
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux 6.19 allows local users to interrupt display updates by triggering fbdev synchronization on an inactive CRTC. The drm_fb_helper_damage_work path waits for CRTC 0 vblank instead of locating the active CRTC carrying fbdev output, so the wait times out. Local low-privileged access and an fbdev layout whose output is not on CRTC 0 are required; the reported effect is delayed or unresponsive display updates.

The record

CVE
CVE-2026-72313
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-366, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.19
  2. Affected versionversion=d8c4bddcd8bcb41885d3db2ba18c840c411564c2 <06c2b8d7ea2bcb014dd974fc3bc6d128d65d7477
  3. Affected versionversion=d8c4bddcd8bcb41885d3db2ba18c840c411564c2 <7d84acf641afb68aa8efe40815ef43779ddb12fd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.19; version=d8c4bddcd8bcb41885d3db2ba18c840c411564c2 <06c2b8d7ea2bcb014dd974fc3bc6d128d65d7477; version=d8c4bddcd8bcb41885d3db2ba18c840c411564c2 <7d84acf641afb68aa8efe40815ef43779ddb12fd

Published CVSS scores

3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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-366Race Condition Within a Thread
T1499Endpoint Denial of Service

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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