---
id: CVE-2026-46252
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  regulator: core: fix locking in regulator_resolve_supply() error path

  If late enabling of a supply regulator fails in
  regulator_resolve_supply(), the code currently tr…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  regulator: core: fix locking in regulator_resolve_supply() error path

  If late enabling of a supply regulator fails in
  regulator_resolve_supply(), the code currently tr…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-667
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.2.1, < 6.19.4'
  - linux_kernel = 4.2
patched:
  - linux_kernel 6.19.4
published: '2026-06-03'
updated: '2026-07-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46252'
references:
  - url: 'https://git.kernel.org/stable/c/3b7fffd7a8984a1c009f668765ee7631fd6b87c8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/497330b203d2c59c5ff3fa4c34d14494d7203bc3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/60747114fd2a38739130b715e7b2d40ce848f0be'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a8a2eab1166bc33ee38ca371cff425bdb5681e47'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bde74af8d4466213007bdd42cc85fa72c861dea7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c66e0db0f37290b53c57994f998bb55590364fd0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c84860dac7af7dc3c3e3c9ae86d65e222c2f3b0c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e77357dc2293283fc08a485b1e2e571d91d02622'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00125
epssPercentile: 0.01903
ingestedAt: '2026-07-04T12:56:09.584Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

regulator: core: fix locking in regulator_resolve_supply() error path

If late enabling of a supply regulator fails in
regulator_resolve_supply(), the code currently triggers a lockdep
warning:

    WARNING: drivers/regulator/core.c:2649 at _regulator_put+0x80/0xa0, CPU#6: kworker/u32:4/596
    ...
    Call trace:
     _regulator_put+0x80/0xa0 (P)
     regulator_resolve_supply+0x7cc/0xbe0
     regulator_register_resolve_supply+0x28/0xb8

as the regulator_list_mutex must be held when calling _regulator_put().

To solve this, simply switch to using regulator_put().

While at it, we should also make sure that no concurrent access happens
to our rdev while we clear out the supply pointer. Add appropriate
locking to ensure that.

While the code in question will be removed altogether in a follow-up
commit, I believe it is still beneficial to have this corrected before
removal for future reference.

## Affected

- `linux_kernel >= 4.2.1, < 6.19.4`
- `linux_kernel = 4.2`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.4`