| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37967: usb: typec: ucsi: displayport: Fix deadlock |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usb: typec: ucsi: displayport: Fix deadlock |
| |
| This patch introduces the ucsi_con_mutex_lock / ucsi_con_mutex_unlock |
| functions to the UCSI driver. ucsi_con_mutex_lock ensures the connector |
| mutex is only locked if a connection is established and the partner pointer |
| is valid. This resolves a deadlock scenario where |
| ucsi_displayport_remove_partner holds con->mutex waiting for |
| dp_altmode_work to complete while dp_altmode_work attempts to acquire it. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37967 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.2 with commit af8622f6a585d8d82b11cd7987e082861fd0edd3 and fixed in 5.15.184 with commit f4bd982563c2fd41ec9ca6c517c392d759db801c |
| Issue introduced in 5.2 with commit af8622f6a585d8d82b11cd7987e082861fd0edd3 and fixed in 6.1.140 with commit f32451ca4cb7dc53f2a0e2e66b84d34162747eb7 |
| Issue introduced in 5.2 with commit af8622f6a585d8d82b11cd7987e082861fd0edd3 and fixed in 6.6.92 with commit 962ce9028ca6eb450d5c205238a3ee27de9d214d |
| Issue introduced in 5.2 with commit af8622f6a585d8d82b11cd7987e082861fd0edd3 and fixed in 6.12.30 with commit 5924b324468845fc795bd76f588f51d7ab4f202d |
| Issue introduced in 5.2 with commit af8622f6a585d8d82b11cd7987e082861fd0edd3 and fixed in 6.14.7 with commit 61fc1a8e1e10cc784cab5829930838aaf1d37af5 |
| Issue introduced in 5.2 with commit af8622f6a585d8d82b11cd7987e082861fd0edd3 and fixed in 6.15 with commit 364618c89d4c57c85e5fc51a2446cd939bf57802 |
| |
| 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-2025-37967 |
| 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/typec/ucsi/displayport.c |
| drivers/usb/typec/ucsi/ucsi.c |
| drivers/usb/typec/ucsi/ucsi.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/f4bd982563c2fd41ec9ca6c517c392d759db801c |
| https://git.kernel.org/stable/c/f32451ca4cb7dc53f2a0e2e66b84d34162747eb7 |
| https://git.kernel.org/stable/c/962ce9028ca6eb450d5c205238a3ee27de9d214d |
| https://git.kernel.org/stable/c/5924b324468845fc795bd76f588f51d7ab4f202d |
| https://git.kernel.org/stable/c/61fc1a8e1e10cc784cab5829930838aaf1d37af5 |
| https://git.kernel.org/stable/c/364618c89d4c57c85e5fc51a2446cd939bf57802 |
