CVE-2025-40232

System crash via inconsistent enabled_monitors iterator types

Published Dec 4, 2025 · Updated May 11, 2026

Type confusion in the Linux kernel RV subsystem in 6.17 through 6.17.5 allows attackers to crash the system via enabled_monitors. Callbacks in enabled_monitors_seq_ops interpret the same iterator as both struct rv_monitor * and struct list_head *, causing a wrong type cast during file reads. Triggering requires access to read the RV enabled_monitors tracefs file; the published record does not specify the privilege or configuration needed for that access.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in the Linux kernel RV subsystem in 6.17 through 6.17.5 allows attackers to crash the system via enabled_monitors. Callbacks in enabled_monitors_seq_ops interpret the same iterator as both struct rv_monitor * and struct list_head *, causing a wrong type cast during file reads. Triggering requires access to read the RV enabled_monitors tracefs file; the published record does not specify the privilege or configuration needed for that access.

The record

CVE
CVE-2025-40232
Published
Dec 4, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 4, 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?

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  1. Affected versionversion=6.17
  2. Affected versionversion=de090d1ccae1e191af4beb92964591c6e4f31f28 <103541e6a5854b08a25e4caa61e990af1009a52e
  3. Affected versionversion=de090d1ccae1e191af4beb92964591c6e4f31f28 <8948a0338d33c4a7ef1e0c439a3ad1d5fe9355ae

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.17; version=de090d1ccae1e191af4beb92964591c6e4f31f28 <103541e6a5854b08a25e4caa61e990af1009a52e; version=de090d1ccae1e191af4beb92964591c6e4f31f28 <8948a0338d33c4a7ef1e0c439a3ad1d5fe9355ae

Published CVSS scores

No CVSS assessment is available in this record.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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