| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-23154: io_uring/net: fix io_req_post_cqe abuse by send bundle |
| |
| Description |
| =========== |
| |
| 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. |
| |
| The Linux kernel CVE team has assigned CVE-2025-23154 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.10 with commit a05d1f625c7aa681d8816bc0f10089289ad07aad and fixed in 6.12.24 with commit b7c6d081c19a5e11bbd77bb97a62cff2b6b21cb5 |
| Issue introduced in 6.10 with commit a05d1f625c7aa681d8816bc0f10089289ad07aad and fixed in 6.13.12 with commit 7888c9fc0b2d3636f2e821ed1ad3c6920fa8e378 |
| Issue introduced in 6.10 with commit a05d1f625c7aa681d8816bc0f10089289ad07aad and fixed in 6.14.3 with commit 9aa804e6b9696998308095fb9d335046a71550f1 |
| Issue introduced in 6.10 with commit a05d1f625c7aa681d8816bc0f10089289ad07aad and fixed in 6.15 with commit 6889ae1b4df1579bcdffef023e2ea9a982565dff |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-23154 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| include/linux/io_uring_types.h |
| io_uring/io_uring.c |
| io_uring/net.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/b7c6d081c19a5e11bbd77bb97a62cff2b6b21cb5 |
| https://git.kernel.org/stable/c/7888c9fc0b2d3636f2e821ed1ad3c6920fa8e378 |
| https://git.kernel.org/stable/c/9aa804e6b9696998308095fb9d335046a71550f1 |
| https://git.kernel.org/stable/c/6889ae1b4df1579bcdffef023e2ea9a982565dff |
