| 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-2023-52926: io_uring/rw: split io_read() into a helper |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| IORING_OP_READ did not correctly consume the provided buffer list when |
| read i/o returned < 0 (except for -EAGAIN and -EIOCBQUEUED return). |
| This can lead to a potential use-after-free when the completion via |
| io_rw_done runs at separate context. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52926 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.1 with commit 2b188cc1bb857a9d4701ae59aa7768b5124e262e and fixed in 6.1.122 with commit 72060434a14caea20925e492310d6e680e3f9007 |
| Issue introduced in 5.1 with commit 2b188cc1bb857a9d4701ae59aa7768b5124e262e and fixed in 6.6.68 with commit 6c27fc6a783c8a77c756dd5461b15e465020d075 |
| Issue introduced in 5.1 with commit 2b188cc1bb857a9d4701ae59aa7768b5124e262e and fixed in 6.7 with commit a08d195b586a217d76b42062f88f375a3eedda4d |
| |
| 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-2023-52926 |
| 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/rw.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/72060434a14caea20925e492310d6e680e3f9007 |
| https://git.kernel.org/stable/c/6c27fc6a783c8a77c756dd5461b15e465020d075 |
| https://git.kernel.org/stable/c/a08d195b586a217d76b42062f88f375a3eedda4d |
