| 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-2023-52647: media: nxp: imx8-isi: Check whether crossbar pad is non-NULL before access |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| media: nxp: imx8-isi: Check whether crossbar pad is non-NULL before access |
| |
| When translating source to sink streams in the crossbar subdev, the |
| driver tries to locate the remote subdev connected to the sink pad. The |
| remote pad may be NULL, if userspace tries to enable a stream that ends |
| at an unconnected crossbar sink. When that occurs, the driver |
| dereferences the NULL pad, leading to a crash. |
| |
| Prevent the crash by checking if the pad is NULL before using it, and |
| return an error if it is. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52647 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.4 with commit cf21f328fcafacf4f96e7a30ef9dceede1076378 and fixed in 6.6.24 with commit c95318607fbe8fdd44991a8dad2e44118e6b8812 |
| Issue introduced in 6.4 with commit cf21f328fcafacf4f96e7a30ef9dceede1076378 and fixed in 6.7.12 with commit c4bd29bf5b7f67925bc1abd16069f22dadf5f061 |
| Issue introduced in 6.4 with commit cf21f328fcafacf4f96e7a30ef9dceede1076378 and fixed in 6.8.3 with commit 91c8ce42fcde09f1da24acab9013b3e19cb88a4e |
| Issue introduced in 6.4 with commit cf21f328fcafacf4f96e7a30ef9dceede1076378 and fixed in 6.9 with commit eb2f932100288dbb881eadfed02e1459c6b9504c |
| |
| 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-2023-52647 |
| 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: |
| drivers/media/platform/nxp/imx8-isi/imx8-isi-crossbar.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/c95318607fbe8fdd44991a8dad2e44118e6b8812 |
| https://git.kernel.org/stable/c/c4bd29bf5b7f67925bc1abd16069f22dadf5f061 |
| https://git.kernel.org/stable/c/91c8ce42fcde09f1da24acab9013b3e19cb88a4e |
| https://git.kernel.org/stable/c/eb2f932100288dbb881eadfed02e1459c6b9504c |
