| 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-2023-52445: media: pvrusb2: fix use after free on context disconnection |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| media: pvrusb2: fix use after free on context disconnection |
| |
| Upon module load, a kthread is created targeting the |
| pvr2_context_thread_func function, which may call pvr2_context_destroy |
| and thus call kfree() on the context object. However, that might happen |
| before the usb hub_event handler is able to notify the driver. This |
| patch adds a sanity check before the invalid read reported by syzbot, |
| within the context disconnection call stack. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52445 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.26 with commit e5be15c63804e05b5a94197524023702a259e308 and fixed in 4.19.306 with commit ec36c134dd020d28e312c2f1766f85525e747aab |
| Issue introduced in 2.6.26 with commit e5be15c63804e05b5a94197524023702a259e308 and fixed in 5.4.268 with commit 47aa8fcd5e8b5563af4042a00f25ba89bef8f33d |
| Issue introduced in 2.6.26 with commit e5be15c63804e05b5a94197524023702a259e308 and fixed in 5.10.209 with commit 3233d8bf7893550045682192cb227af7fa3defeb |
| Issue introduced in 2.6.26 with commit e5be15c63804e05b5a94197524023702a259e308 and fixed in 5.15.148 with commit ec3634ebe23fc3c44ebc67c6d25917300bc68c08 |
| Issue introduced in 2.6.26 with commit e5be15c63804e05b5a94197524023702a259e308 and fixed in 6.1.75 with commit 30773ea47d41773f9611ffb4ebc9bda9d19a9e7e |
| Issue introduced in 2.6.26 with commit e5be15c63804e05b5a94197524023702a259e308 and fixed in 6.6.14 with commit 2cf0005d315549b8d2b940ff96a66c2a889aa795 |
| Issue introduced in 2.6.26 with commit e5be15c63804e05b5a94197524023702a259e308 and fixed in 6.7.2 with commit 437b5f57732bb4cc32cc9f8895d2010ee9ff521c |
| Issue introduced in 2.6.26 with commit e5be15c63804e05b5a94197524023702a259e308 and fixed in 6.8 with commit ded85b0c0edd8f45fec88783d7555a5b982449c1 |
| |
| 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-2023-52445 |
| 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/usb/pvrusb2/pvrusb2-context.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/ec36c134dd020d28e312c2f1766f85525e747aab |
| https://git.kernel.org/stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33d |
| https://git.kernel.org/stable/c/3233d8bf7893550045682192cb227af7fa3defeb |
| https://git.kernel.org/stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08 |
| https://git.kernel.org/stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7e |
| https://git.kernel.org/stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795 |
| https://git.kernel.org/stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521c |
| https://git.kernel.org/stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1 |
