CVE-2025-21831

System hang via incorrect PCIe D3hot policy

Published Mar 6, 2025 · Updated May 11, 2026

Denial of service in the Linux kernel allows local users to hang affected TUXEDO Sirius 16 Gen 1 systems during resume. The PCI suspend policy places non-wakeup root ports lacking platform power management into D3hot, preventing the affected controller from resuming. The hang is limited to specific root ports on this laptop model with an older BIOS and interrupts system availability after suspend.

CVSS severity5.5
Medium
EPSS probability0.18%
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 the Linux kernel allows local users to hang affected TUXEDO Sirius 16 Gen 1 systems during resume. The PCI suspend policy places non-wakeup root ports lacking platform power management into D3hot, preventing the affected controller from resuming. The hang is limited to specific root ports on this laptop model with an older BIOS and interrupts system availability after suspend.

The record

CVE
CVE-2025-21831
Published
Mar 6, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 6, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.8
  2. Affected versionversion=9d26d3a8f1b0c442339a235f9508bdad8af91043 <5ee3dd6e59b834e4d66e8b16fc684749ee40a257
  3. Affected versionversion=9d26d3a8f1b0c442339a235f9508bdad8af91043 <8852e056e297df1d8635ee7504e780d3184e45d0
  4. Affected versionversion=9d26d3a8f1b0c442339a235f9508bdad8af91043 <a78dfe50fffe6058afed2bb04c50c2c9a16664ee
  5. Affected versionversion=9d26d3a8f1b0c442339a235f9508bdad8af91043 <b1049f2d68693c80a576c4578d96774a68df2bad

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=9d26d3a8f1b0c442339a235f9508bdad8af91043 <5ee3dd6e59b834e4d66e8b16fc684749ee40a257; version=9d26d3a8f1b0c442339a235f9508bdad8af91043 <8852e056e297df1d8635ee7504e780d3184e45d0; version=9d26d3a8f1b0c442339a235f9508bdad8af91043 <a78dfe50fffe6058afed2bb04c50c2c9a16664ee; version=9d26d3a8f1b0c442339a235f9508bdad8af91043 <b1049f2d68693c80a576c4578d96774a68df2bad

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 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

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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