---
id: CVE-2025-40319
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Sync pending IRQ work before freeing ring buffer

  Fix a race where irq_work can be queued in bpf_ringbuf_commit()
  but the ring buffer is freed before the work exec…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Sync pending IRQ work before freeing ring buffer

  Fix a race where irq_work can be queued in bpf_ringbuf_commit()
  but the ring buffer is freed before the work exec…
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'
published: '2025-12-08'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T22:10:00.210'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-40319'
references:
  - url: 'https://git.kernel.org/stable/c/10ca3b2eec384628bc9f5d8190aed9427ad2dde6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/430e15544f11f8de26b2b5109c7152f71b78295e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/47626748a2a00068dbbd5836d19076637b4e235b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4e9077638301816a7d73fa1e1b4c1db4a7e3b59c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6451141103547f4efd774e912418a3b4318046c6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/de2ce6b14bc3e565708a39bdba3ef9162aeffc72'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e1828c7a8d8135e21ff6adaaa9458c32aae13b11'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00144
epssPercentile: 0.03284
ingestedAt: '2026-10-14T23:00:02.024Z'
---

## Overview

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

bpf: Sync pending IRQ work before freeing ring buffer

Fix a race where irq_work can be queued in bpf_ringbuf_commit()
but the ring buffer is freed before the work executes.
In the syzbot reproducer, a BPF program attached to sched_switch
triggers bpf_ringbuf_commit(), queuing an irq_work. If the ring buffer
is freed before this work executes, the irq_work thread may accesses
freed memory.
Calling `irq_work_sync(&rb->work)` ensures that all pending irq_work
complete before freeing the buffer.

## Remediation

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