---
id: CVE-2026-53327
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  debugobjects: Do not fill_pool() if pi_blocked_on

  On RT enabled kernels, fill_pool() ends up calling rtlock_lock(), which
  asserts if current::pi_blocked_on is set, bec…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  debugobjects: Do not fill_pool() if pi_blocked_on

  On RT enabled kernels, fill_pool() ends up calling rtlock_lock(), which
  asserts if current::pi_blocked_on is set, bec…
severity: none
published: '2026-07-01'
updated: '2026-07-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53327'
references:
  - url: 'https://git.kernel.org/stable/c/33bee10644f8fff3b1a0187ad5ad34513e5e8e72'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3a408cae608d9c075dd3a9e5cfc03b3cb0726863'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3f6a3b24ab7b9d51f6f4778254bef0e5847beb55'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5f41161059fd0f1bbf18c90f3180e38cc45a14eb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8a680d54f1adf3e3aa815578684556716fda6f0c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a3383df76f0d7a597066df018409eb9e5e698064'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00129
epssPercentile: 0.02114
ingestedAt: '2026-07-04T13:56:12.009Z'
---

## Overview

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

debugobjects: Do not fill_pool() if pi_blocked_on

On RT enabled kernels, fill_pool() ends up calling rtlock_lock(), which
asserts if current::pi_blocked_on is set, because a task can obviously only
block on one lock as otherwise the priority inheritenace chain gets
corrupted.

Prevent this by expanding the conditional to take current::pi_blocked_on
into account.

## Remediation

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