---
id: CVE-2026-63977
title: 'dpll: zl3073x: use __dpll_device_change_ntf() and remove change_work'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dpll: zl3073x: use __dpll_device_change_ntf() and remove change_work

  The change_work was introduced to send device change notifications
  from DPLL device callbacks with…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 9363b4837659d1b7ee04cfa714373ce4b4b8269f <
    e7a33807fb3f87a855993474ac21684ce105927b
  - >-
    Linux >= 9363b4837659d1b7ee04cfa714373ce4b4b8269f <
    d733f519f6443540f8359461a34e3b0042099bbe
  - Linux 6.18
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:34:28.879643Z'
published: '2026-07-19'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:42:15.726Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-63977'
references:
  - url: 'https://git.kernel.org/stable/c/e7a33807fb3f87a855993474ac21684ce105927b'
  - url: 'https://git.kernel.org/stable/c/d733f519f6443540f8359461a34e3b0042099bbe'
tags:
  - cve.org
epss: 0.00165
epssPercentile: 0.05353
ingestedAt: '2026-10-16T17:24:46.786Z'
---

## Overview

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

dpll: zl3073x: use __dpll_device_change_ntf() and remove change_work

The change_work was introduced to send device change notifications
from DPLL device callbacks without deadlocking on dpll_lock, since
the callbacks are already invoked under that lock. Now that
__dpll_device_change_ntf() is exported for callers that already
hold dpll_lock, use it directly and remove the change_work
infrastructure entirely.

This eliminates a race condition where change_work could be
re-scheduled after cancel_work_sync() during device teardown,
potentially causing the handler to dereference a freed or NULL
dpll_dev pointer.

## Affected

- `Linux >= 9363b4837659d1b7ee04cfa714373ce4b4b8269f < e7a33807fb3f87a855993474ac21684ce105927b`
- `Linux >= 9363b4837659d1b7ee04cfa714373ce4b4b8269f < d733f519f6443540f8359461a34e3b0042099bbe`
- `Linux 6.18`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.