| From bippy-5f407fcff5a0 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-2025-21863: io_uring: prevent opcode speculation |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| io_uring: prevent opcode speculation |
| |
| sqe->opcode is used for different tables, make sure we santitise it |
| against speculations. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21863 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.6 with commit d3656344fea0339fb0365c8df4d2beba4e0089cd and fixed in 6.6.80 with commit b9826e3b26ec031e9063f64a7c735449c43955e4 |
| Issue introduced in 5.6 with commit d3656344fea0339fb0365c8df4d2beba4e0089cd and fixed in 6.12.17 with commit 506b9b5e8c2d2a411ea8fe361333f5081c56d23a |
| Issue introduced in 5.6 with commit d3656344fea0339fb0365c8df4d2beba4e0089cd and fixed in 6.13.5 with commit fdbfd52bd8b85ed6783365ff54c82ab7067bd61b |
| Issue introduced in 5.6 with commit d3656344fea0339fb0365c8df4d2beba4e0089cd and fixed in 6.14 with commit 1e988c3fe1264708f4f92109203ac5b1d65de50b |
| |
| 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-2025-21863 |
| 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/io_uring.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/b9826e3b26ec031e9063f64a7c735449c43955e4 |
| https://git.kernel.org/stable/c/506b9b5e8c2d2a411ea8fe361333f5081c56d23a |
| https://git.kernel.org/stable/c/fdbfd52bd8b85ed6783365ff54c82ab7067bd61b |
| https://git.kernel.org/stable/c/1e988c3fe1264708f4f92109203ac5b1d65de50b |
