---
id: CVE-2026-52979
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: psp: check for device unregister when creating assoc

  psp_assoc_device_get_locked() obtains a psp_dev reference via
  psp_dev_get_for_sock() (which uses psp_dev_tryg…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: psp: check for device unregister when creating assoc

  psp_assoc_device_get_locked() obtains a psp_dev reference via
  psp_dev_get_for_sock() (which uses psp_dev_tryg…
severity: none
published: '2026-06-24'
updated: '2026-07-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52979'
references:
  - url: 'https://git.kernel.org/stable/c/b89769f936a8fa9e66de72ddc1b71a9745a488e6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d90df5ce6deb2424de3ad89bcc693ac1b67accc9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e201c57073e624dd2ba5beaf9eda31e19b77b332'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00124
epssPercentile: 0.01796
ingestedAt: '2026-07-11T13:13:25.413Z'
---

## Overview

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

net: psp: check for device unregister when creating assoc

psp_assoc_device_get_locked() obtains a psp_dev reference via
psp_dev_get_for_sock() (which uses psp_dev_tryget() under RCU);
it then acquires psd->lock and drops the reference. Before
the lock is taken, psp_dev_unregister() can run to completion:
take psd->lock, clear out state, unlock, drop the registration
reference.

The expectation is that the lock prevents device unregistration,
but much like with netdevs special care has to be taken when
"upgrading" a reference to a locked device. Add the missing
check if device is still alive. psp_dev_is_registered() exists
already but had no callers, which makes me wonder if I either
forgot to add this or lost the check during refactoring...

## Remediation

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