| 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-2021-46930: usb: mtu3: fix list_head check warning |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usb: mtu3: fix list_head check warning |
| |
| This is caused by uninitialization of list_head. |
| |
| BUG: KASAN: use-after-free in __list_del_entry_valid+0x34/0xe4 |
| |
| Call trace: |
| dump_backtrace+0x0/0x298 |
| show_stack+0x24/0x34 |
| dump_stack+0x130/0x1a8 |
| print_address_description+0x88/0x56c |
| __kasan_report+0x1b8/0x2a0 |
| kasan_report+0x14/0x20 |
| __asan_load8+0x9c/0xa0 |
| __list_del_entry_valid+0x34/0xe4 |
| mtu3_req_complete+0x4c/0x300 [mtu3] |
| mtu3_gadget_stop+0x168/0x448 [mtu3] |
| usb_gadget_unregister_driver+0x204/0x3a0 |
| unregister_gadget_item+0x44/0xa4 |
| |
| The Linux kernel CVE team has assigned CVE-2021-46930 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.2 with commit 83374e035b6286731c5aa617844c7b724294c2a7 and fixed in 5.4.170 with commit 585e2b244dda7ea733274e4b8fa27853d625d3bf |
| Issue introduced in 5.2 with commit 83374e035b6286731c5aa617844c7b724294c2a7 and fixed in 5.10.90 with commit 3b6efe0b7ba03cc2acf0694b46d6ff33c5b4c295 |
| Issue introduced in 5.2 with commit 83374e035b6286731c5aa617844c7b724294c2a7 and fixed in 5.15.13 with commit 249ddfbe00570d6dc76208e88017937d4d374c79 |
| Issue introduced in 5.2 with commit 83374e035b6286731c5aa617844c7b724294c2a7 and fixed in 5.16 with commit 8c313e3bfd9adae8d5c4ba1cc696dcbc86fbf9bf |
| |
| 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-2021-46930 |
| 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/usb/mtu3/mtu3_gadget.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/585e2b244dda7ea733274e4b8fa27853d625d3bf |
| https://git.kernel.org/stable/c/3b6efe0b7ba03cc2acf0694b46d6ff33c5b4c295 |
| https://git.kernel.org/stable/c/249ddfbe00570d6dc76208e88017937d4d374c79 |
| https://git.kernel.org/stable/c/8c313e3bfd9adae8d5c4ba1cc696dcbc86fbf9bf |
