CVE-2025-37745

Local system hang via hibernation lock inversion

Published May 1, 2025 · Updated May 11, 2026

Improper locking in affected Linux kernel versions allows local users to hang the system through the hibernation compressor parameter. hibernate_compressor_param_set() blocks on system_transition_mutex while param_lock is held, reversing a dependency created by device registration and power-management notifier locks. Exploitation requires local access to write the compressor sysfs parameter during the conflicting operation, and the demonstrated consequence is a deadlock that interrupts the host.

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

Improper locking in affected Linux kernel versions allows local users to hang the system through the hibernation compressor parameter. hibernate_compressor_param_set() blocks on system_transition_mutex while param_lock is held, reversing a dependency created by device registration and power-management notifier locks. Exploitation requires local access to write the compressor sysfs parameter during the conflicting operation, and the demonstrated consequence is a deadlock that interrupts the host.

The record

CVE
CVE-2025-37745
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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=3fec6e5961b77af6a952b77f5c2ea26f7513b216 <11ae4fec1f4b4ee06770a572c37d89cbaecbf66e
  2. Affected versionversion=3fec6e5961b77af6a952b77f5c2ea26f7513b216 <3b2c3806ef4253595dfcb8b58352cfab55c9bfb0
  3. Affected versionversion=3fec6e5961b77af6a952b77f5c2ea26f7513b216 <52323ed1444ea5c2a5f1754ea0a2d9c8c216ccdf
  4. Affected versionversion=3fec6e5961b77af6a952b77f5c2ea26f7513b216 <6dbaa8583af74814a5aae03a337cb1722c414808
  5. Affected versionversion=6.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3fec6e5961b77af6a952b77f5c2ea26f7513b216 <11ae4fec1f4b4ee06770a572c37d89cbaecbf66e; version=3fec6e5961b77af6a952b77f5c2ea26f7513b216 <3b2c3806ef4253595dfcb8b58352cfab55c9bfb0; version=3fec6e5961b77af6a952b77f5c2ea26f7513b216 <52323ed1444ea5c2a5f1754ea0a2d9c8c216ccdf; version=3fec6e5961b77af6a952b77f5c2ea26f7513b216 <6dbaa8583af74814a5aae03a337cb1722c414808; version=6.9

Published CVSS scores

5.5NVDCVSS: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

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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

CWE-667Improper Locking
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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