CVE-2025-37967

Service interruption via UCSI DisplayPort deadlock

Published May 20, 2025 · Updated May 11, 2026

Deadlock in the Linux kernel UCSI DisplayPort code allows local users to interrupt connector service during USB Type-C partner removal. ucsi_displayport_remove_partner holds con->mutex while flushing dp_altmode_work, whose worker then waits to acquire the same mutex. The condition requires an established UCSI connection and a valid DisplayPort partner while alternate-mode work remains active; the circular wait stalls connector teardown indefinitely.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deadlock in the Linux kernel UCSI DisplayPort code allows local users to interrupt connector service during USB Type-C partner removal. ucsi_displayport_remove_partner holds con->mutex while flushing dp_altmode_work, whose worker then waits to acquire the same mutex. The condition requires an established UCSI connection and a valid DisplayPort partner while alternate-mode work remains active; the circular wait stalls connector teardown indefinitely.

The record

CVE
CVE-2025-37967
Published
May 20, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 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

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=5.2
  2. Affected versionversion=af8622f6a585d8d82b11cd7987e082861fd0edd3 <364618c89d4c57c85e5fc51a2446cd939bf57802
  3. Affected versionversion=af8622f6a585d8d82b11cd7987e082861fd0edd3 <5924b324468845fc795bd76f588f51d7ab4f202d
  4. Affected versionversion=af8622f6a585d8d82b11cd7987e082861fd0edd3 <61fc1a8e1e10cc784cab5829930838aaf1d37af5
  5. Affected versionversion=af8622f6a585d8d82b11cd7987e082861fd0edd3 <962ce9028ca6eb450d5c205238a3ee27de9d214d
  6. Affected versionversion=af8622f6a585d8d82b11cd7987e082861fd0edd3 <f32451ca4cb7dc53f2a0e2e66b84d34162747eb7
  7. Affected versionversion=af8622f6a585d8d82b11cd7987e082861fd0edd3 <f4bd982563c2fd41ec9ca6c517c392d759db801c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.2; version=af8622f6a585d8d82b11cd7987e082861fd0edd3 <364618c89d4c57c85e5fc51a2446cd939bf57802; version=af8622f6a585d8d82b11cd7987e082861fd0edd3 <5924b324468845fc795bd76f588f51d7ab4f202d; version=af8622f6a585d8d82b11cd7987e082861fd0edd3 <61fc1a8e1e10cc784cab5829930838aaf1d37af5; version=af8622f6a585d8d82b11cd7987e082861fd0edd3 <962ce9028ca6eb450d5c205238a3ee27de9d214d; version=af8622f6a585d8d82b11cd7987e082861fd0edd3 <f32451ca4cb7dc53f2a0e2e66b84d34162747eb7; version=af8622f6a585d8d82b11cd7987e082861fd0edd3 <f4bd982563c2fd41ec9ca6c517c392d759db801c

Published CVSS scores

4.7OracleCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CanonicalCVSS: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

CWE-667Improper Locking
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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