CVE-2025-40108

Boot hang via serial runtime power management

Published Nov 9, 2025 · Updated Nov 9, 2025

Denial of service in Linux 6.17 through 6.17.1 causes Qualcomm RB1 systems to hang serial initialization during normal boot. The qcom-geni serial driver enables runtime power management during probe, causing nested rpm_resume waits that leave a worker blocked in uninterruptible sleep. The regression requires QRB2210/RB1 hardware and the boot-time probe path; Canonical states that attackers cannot invoke or influence that event.

CVSS severity4.8
Medium
EPSS probability0.17%
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 6.17 through 6.17.1 causes Qualcomm RB1 systems to hang serial initialization during normal boot. The qcom-geni serial driver enables runtime power management during probe, causing nested rpm_resume waits that leave a worker blocked in uninterruptible sleep. The regression requires QRB2210/RB1 hardware and the boot-time probe path; Canonical states that attackers cannot invoke or influence that event.

The record

CVE
CVE-2025-40108
Published
Nov 9, 2025
Updated
Nov 9, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 9, 2025Record 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=1afa70632c390488308d8e94e037df6895a3e1ac <1e810d81769e16637bcd845ba37fbc1eba5d4bd2
  2. Affected versionversion=1afa70632c390488308d8e94e037df6895a3e1ac <a699213d4e6ef4286348c6439837990f121e0c03
  3. Affected versionversion=6.17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1afa70632c390488308d8e94e037df6895a3e1ac <1e810d81769e16637bcd845ba37fbc1eba5d4bd2; version=1afa70632c390488308d8e94e037df6895a3e1ac <a699213d4e6ef4286348c6439837990f121e0c03; version=6.17

Published CVSS scores

4.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
3.3SUSECVSS: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
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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