CVE-2025-39722

System crash via reserved CAAM register access

Published Sep 5, 2025 · Updated Sep 5, 2025

Denial of service in the Linux CAAM driver from 6.10 allows local users to crash affected i.MX8 systems by initiating suspend. During caam_ctrl_suspend, the driver reads reserved CAAM register page 0 because its OP-TEE-only check does not cover pages owned by the SECO or Secure Enclave. Reachability requires an i.MX8QM or i.MX8ULP platform where another management core reserves page 0, and the resulting synchronous external abort crashes the kernel.

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

Denial of service in the Linux CAAM driver from 6.10 allows local users to crash affected i.MX8 systems by initiating suspend. During caam_ctrl_suspend, the driver reads reserved CAAM register page 0 because its OP-TEE-only check does not cover pages owned by the SECO or Secure Enclave. Reachability requires an i.MX8QM or i.MX8ULP platform where another management core reserves page 0, and the resulting synchronous external abort crashes the kernel.

The record

CVE
CVE-2025-39722
Published
Sep 5, 2025
Updated
Sep 5, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 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=6.10
  2. Affected versionversion=d2835701d93cae6d597672ef9dc3fa889867031a <488ed465e579a20485f38080e4ef8b90b69ef7c0
  3. Affected versionversion=d2835701d93cae6d597672ef9dc3fa889867031a <5ffc47feddcf8eb4d8ac7b42111a02c8e8146512
  4. Affected versionversion=d2835701d93cae6d597672ef9dc3fa889867031a <f9534674ce53f133c91c272f091f0242932574ae

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.10; version=d2835701d93cae6d597672ef9dc3fa889867031a <488ed465e579a20485f38080e4ef8b90b69ef7c0; version=d2835701d93cae6d597672ef9dc3fa889867031a <5ffc47feddcf8eb4d8ac7b42111a02c8e8146512; version=d2835701d93cae6d597672ef9dc3fa889867031a <f9534674ce53f133c91c272f091f0242932574ae

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.

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Technologies

Your stack

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Your stack

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