CVE-2026-31784

Service hang via uncleared PXP restart flag

Published May 1, 2026 · Updated May 1, 2026

Denial of service in affected Linux kernel releases allows local users to hang PXP startup through the Intel Xe DRM driver. The pxp_start function leaves its restart flag set after returning to wait_for_idle, so its end-of-function retry jumps back indefinitely. The path requires low-privilege local access and Intel Xe graphics with PXP enabled; the endless in-kernel retry interrupts service.

CVSS severity5.5
Medium
EPSS probability0.12%
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 affected Linux kernel releases allows local users to hang PXP startup through the Intel Xe DRM driver. The pxp_start function leaves its restart flag set after returning to wait_for_idle, so its end-of-function retry jumps back indefinitely. The path requires low-privilege local access and Intel Xe graphics with PXP enabled; the endless in-kernel retry interrupts service.

The record

CVE
CVE-2026-31784
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.17
  2. Affected versionversion=ccd3c6820a9024bcb68c249b644b5e42f0f7b9d2 <400ee45f80480c05c3fa673967f25faab8323753
  3. Affected versionversion=ccd3c6820a9024bcb68c249b644b5e42f0f7b9d2 <76903b2057c8677c2c006e87fede15f496555dc0
  4. Affected versionversion=ccd3c6820a9024bcb68c249b644b5e42f0f7b9d2 <9e962e68a9d26135af67c423767c0983d9ad94c3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.17; version=ccd3c6820a9024bcb68c249b644b5e42f0f7b9d2 <400ee45f80480c05c3fa673967f25faab8323753; version=ccd3c6820a9024bcb68c249b644b5e42f0f7b9d2 <76903b2057c8677c2c006e87fede15f496555dc0; version=ccd3c6820a9024bcb68c249b644b5e42f0f7b9d2 <9e962e68a9d26135af67c423767c0983d9ad94c3

Published CVSS scores

5.5NIST NVDCVSS: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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