| 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-2023-52477: usb: hub: Guard against accesses to uninitialized BOS descriptors |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usb: hub: Guard against accesses to uninitialized BOS descriptors |
| |
| Many functions in drivers/usb/core/hub.c and drivers/usb/core/hub.h |
| access fields inside udev->bos without checking if it was allocated and |
| initialized. If usb_get_bos_descriptor() fails for whatever |
| reason, udev->bos will be NULL and those accesses will result in a |
| crash: |
| |
| BUG: kernel NULL pointer dereference, address: 0000000000000018 |
| PGD 0 P4D 0 |
| Oops: 0000 [#1] PREEMPT SMP NOPTI |
| CPU: 5 PID: 17818 Comm: kworker/5:1 Tainted: G W 5.15.108-18910-gab0e1cb584e1 #1 <HASH:1f9e 1> |
| Hardware name: Google Kindred/Kindred, BIOS Google_Kindred.12672.413.0 02/03/2021 |
| Workqueue: usb_hub_wq hub_event |
| RIP: 0010:hub_port_reset+0x193/0x788 |
| Code: 89 f7 e8 20 f7 15 00 48 8b 43 08 80 b8 96 03 00 00 03 75 36 0f b7 88 92 03 00 00 81 f9 10 03 00 00 72 27 48 8b 80 a8 03 00 00 <48> 83 78 18 00 74 19 48 89 df 48 8b 75 b0 ba 02 00 00 00 4c 89 e9 |
| RSP: 0018:ffffab740c53fcf8 EFLAGS: 00010246 |
| RAX: 0000000000000000 RBX: ffffa1bc5f678000 RCX: 0000000000000310 |
| RDX: fffffffffffffdff RSI: 0000000000000286 RDI: ffffa1be9655b840 |
| RBP: ffffab740c53fd70 R08: 00001b7d5edaa20c R09: ffffffffb005e060 |
| R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 |
| R13: ffffab740c53fd3e R14: 0000000000000032 R15: 0000000000000000 |
| FS: 0000000000000000(0000) GS:ffffa1be96540000(0000) knlGS:0000000000000000 |
| CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| CR2: 0000000000000018 CR3: 000000022e80c005 CR4: 00000000003706e0 |
| Call Trace: |
| hub_event+0x73f/0x156e |
| ? hub_activate+0x5b7/0x68f |
| process_one_work+0x1a2/0x487 |
| worker_thread+0x11a/0x288 |
| kthread+0x13a/0x152 |
| ? process_one_work+0x487/0x487 |
| ? kthread_associate_blkcg+0x70/0x70 |
| ret_from_fork+0x1f/0x30 |
| |
| Fall back to a default behavior if the BOS descriptor isn't accessible |
| and skip all the functionalities that depend on it: LPM support checks, |
| Super Speed capabilitiy checks, U1/U2 states setup. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52477 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.14.328 with commit c64e4dca9aefd232b17ac4c779b608b286654e81 |
| Fixed in 4.19.297 with commit 8e7346bfea56453e31b7421c1c17ca2fb9ed613d |
| Fixed in 5.4.259 with commit 6ad3e9fd3632106696692232bf7ff88b9f7e1bc3 |
| Fixed in 5.10.199 with commit 241f230324337ed5eae3846a554fb6d15169872c |
| Fixed in 5.15.136 with commit 528f0ba9f7a4bc1b61c9b6eb591ff97ca37cac6b |
| Fixed in 6.1.59 with commit fb9895ab9533534335fa83d70344b397ac862c81 |
| Fixed in 6.5.8 with commit 136f69a04e71ba3458d137aec3bb2ce1232c0289 |
| Fixed in 6.6 with commit f74a7afc224acd5e922c7a2e52244d891bbe44ee |
| |
| 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-2023-52477 |
| 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/core/hub.c |
| drivers/usb/core/hub.h |
| |
| |
| 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/c64e4dca9aefd232b17ac4c779b608b286654e81 |
| https://git.kernel.org/stable/c/8e7346bfea56453e31b7421c1c17ca2fb9ed613d |
| https://git.kernel.org/stable/c/6ad3e9fd3632106696692232bf7ff88b9f7e1bc3 |
| https://git.kernel.org/stable/c/241f230324337ed5eae3846a554fb6d15169872c |
| https://git.kernel.org/stable/c/528f0ba9f7a4bc1b61c9b6eb591ff97ca37cac6b |
| https://git.kernel.org/stable/c/fb9895ab9533534335fa83d70344b397ac862c81 |
| https://git.kernel.org/stable/c/136f69a04e71ba3458d137aec3bb2ce1232c0289 |
| https://git.kernel.org/stable/c/f74a7afc224acd5e922c7a2e52244d891bbe44ee |
