---
id: CVE-2025-23154
title: 'io_uring/net: fix io_req_post_cqe abuse by send bundle'
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  io_uring/net: fix io_req_post_cqe abuse by send bundle


  [  114.987980][ T5313] WARNING: CPU: 6 PID: 5313 at io_uring/io_uring.c:872
  io_req_post_cqe+0x12e/0x4f0

  [  114.9…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= a05d1f625c7aa681d8816bc0f10089289ad07aad <
    b7c6d081c19a5e11bbd77bb97a62cff2b6b21cb5
  - >-
    Linux >= a05d1f625c7aa681d8816bc0f10089289ad07aad <
    7888c9fc0b2d3636f2e821ed1ad3c6920fa8e378
  - >-
    Linux >= a05d1f625c7aa681d8816bc0f10089289ad07aad <
    9aa804e6b9696998308095fb9d335046a71550f1
  - >-
    Linux >= a05d1f625c7aa681d8816bc0f10089289ad07aad <
    6889ae1b4df1579bcdffef023e2ea9a982565dff
  - Linux 6.10
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:39:45.990568Z'
published: '2025-05-01'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:41:52.440Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-23154'
references:
  - url: 'https://git.kernel.org/stable/c/b7c6d081c19a5e11bbd77bb97a62cff2b6b21cb5'
  - url: 'https://git.kernel.org/stable/c/7888c9fc0b2d3636f2e821ed1ad3c6920fa8e378'
  - url: 'https://git.kernel.org/stable/c/9aa804e6b9696998308095fb9d335046a71550f1'
  - url: 'https://git.kernel.org/stable/c/6889ae1b4df1579bcdffef023e2ea9a982565dff'
tags:
  - cve.org
epss: 0.00202
epssPercentile: 0.1014
ingestedAt: '2026-11-05T22:38:31.867Z'
---

## Overview

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

io_uring/net: fix io_req_post_cqe abuse by send bundle

[  114.987980][ T5313] WARNING: CPU: 6 PID: 5313 at io_uring/io_uring.c:872 io_req_post_cqe+0x12e/0x4f0
[  114.991597][ T5313] RIP: 0010:io_req_post_cqe+0x12e/0x4f0
[  115.001880][ T5313] Call Trace:
[  115.002222][ T5313]  <TASK>
[  115.007813][ T5313]  io_send+0x4fe/0x10f0
[  115.009317][ T5313]  io_issue_sqe+0x1a6/0x1740
[  115.012094][ T5313]  io_wq_submit_work+0x38b/0xed0
[  115.013223][ T5313]  io_worker_handle_work+0x62a/0x1600
[  115.013876][ T5313]  io_wq_worker+0x34f/0xdf0

As the comment states, io_req_post_cqe() should only be used by
multishot requests, i.e. REQ_F_APOLL_MULTISHOT, which bundled sends are
not. Add a flag signifying whether a request wants to post multiple
CQEs. Eventually REQ_F_APOLL_MULTISHOT should imply the new flag, but
that's left out for simplicity.

## Affected

- `Linux >= a05d1f625c7aa681d8816bc0f10089289ad07aad < b7c6d081c19a5e11bbd77bb97a62cff2b6b21cb5`
- `Linux >= a05d1f625c7aa681d8816bc0f10089289ad07aad < 7888c9fc0b2d3636f2e821ed1ad3c6920fa8e378`
- `Linux >= a05d1f625c7aa681d8816bc0f10089289ad07aad < 9aa804e6b9696998308095fb9d335046a71550f1`
- `Linux >= a05d1f625c7aa681d8816bc0f10089289ad07aad < 6889ae1b4df1579bcdffef023e2ea9a982565dff`
- `Linux 6.10`

## Remediation

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