CVE-2026-46252

Kernel instability via regulator error-path mislocking

Published Jun 3, 2026 · Updated Jun 3, 2026

Improper locking in the Linux kernel regulator core allows local users to trigger kernel instability through a failed supply-regulator enable. The regulator_resolve_supply() error path calls _regulator_put() without regulator_list_mutex and clears the supply pointer without locking rdev against concurrent access. Local low-privileged access and a failed late enable are required; the public record demonstrates a lockdep warning, not a crash or reboot.

CVSS severity5.5
Medium
EPSS probability0.09%
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 the Linux kernel regulator core allows local users to trigger kernel instability through a failed supply-regulator enable. The regulator_resolve_supply() error path calls _regulator_put() without regulator_list_mutex and clears the supply pointer without locking rdev against concurrent access. Local low-privileged access and a failed late enable are required; the public record demonstrates a lockdep warning, not a crash or reboot.

The record

CVE
CVE-2026-46252
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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=36a1f1b6ddc6d1442424e29548e790633ca39c7b <497330b203d2c59c5ff3fa4c34d14494d7203bc3
  2. Affected versionversion=36a1f1b6ddc6d1442424e29548e790633ca39c7b <c66e0db0f37290b53c57994f998bb55590364fd0
  3. Affected versionversion=4.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=36a1f1b6ddc6d1442424e29548e790633ca39c7b <497330b203d2c59c5ff3fa4c34d14494d7203bc3; version=36a1f1b6ddc6d1442424e29548e790633ca39c7b <c66e0db0f37290b53c57994f998bb55590364fd0; version=4.2

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
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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