Bug 2363288 (CVE-2025-23154) - CVE-2025-23154 kernel: io_uring/net: fix io_req_post_cqe abuse by send bundle
Summary: CVE-2025-23154 kernel: io_uring/net: fix io_req_post_cqe abuse by send bundle
Keywords:
Status: NEW
Alias: CVE-2025-23154
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-05-01 14:02 UTC by OSIDB Bzimport
Modified: 2025-05-29 09:23 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2025-05-01 14:02:22 UTC 
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.
Comment 1 Avinash Hanwate 2025-05-02 05:08:30 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050129-CVE-2025-23154-36e0@gregkh/T
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