| From bippy-d175d3acf727 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-35820: io_uring: fix io_queue_proc modifying req->flags |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| io_uring: fix io_queue_proc modifying req->flags |
| |
| With multiple poll entries __io_queue_proc() might be running in |
| parallel with poll handlers and possibly task_work, we should not be |
| carelessly modifying req->flags there. io_poll_double_prepare() handles |
| a similar case with locking but it's much easier to move it into |
| __io_arm_poll_handler(). |
| |
| The Linux kernel CVE team has assigned CVE-2024-35820 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.7 with commit 595e52284d24 and fixed in 6.7.12 with commit 51a490a7f63c |
| Issue introduced in 6.7 with commit 595e52284d24 and fixed in 6.8.3 with commit 0ecb8919469e |
| Issue introduced in 6.7 with commit 595e52284d24 and fixed in 6.9 with commit 1a8ec63b2b6c |
| |
| 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-2024-35820 |
| 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: |
| io_uring/poll.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/51a490a7f63cae0754120e7c04f4f47920bd48db |
| https://git.kernel.org/stable/c/0ecb8919469e6d5c74eea24086b34ce1bda5aef7 |
| https://git.kernel.org/stable/c/1a8ec63b2b6c91caec87d4e132b1f71b5df342be |
