| From bippy-7c5fe7eed585 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-2025-21923: HID: hid-steam: Fix use-after-free when detaching device |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| HID: hid-steam: Fix use-after-free when detaching device |
| |
| When a hid-steam device is removed it must clean up the client_hdev used for |
| intercepting hidraw access. This can lead to scheduling deferred work to |
| reattach the input device. Though the cleanup cancels the deferred work, this |
| was done before the client_hdev itself is cleaned up, so it gets rescheduled. |
| This patch fixes the ordering to make sure the deferred work is properly |
| canceled. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21923 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6.79 with commit e1147961b2145fa61c3078a4a797d9576cde91ab and fixed in 6.6.83 with commit 026714ec7546de741826324a6a1914c91024d06c |
| Issue introduced in 6.12.16 with commit 3e38cbbfa0a128a9d64773240a9eb3bc7bae3b1a and fixed in 6.12.19 with commit a899adf7063c6745aaff1ec869f3c7f6329ed0a1 |
| Issue introduced in 6.13.4 with commit 053fa3888d2a957f4db26c05e503f4c6b9570a30 and fixed in 6.13.7 with commit ea3f18d2f02629653b7bfe42607737ccd1343e54 |
| |
| 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-2025-21923 |
| 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/hid/hid-steam.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/026714ec7546de741826324a6a1914c91024d06c |
| https://git.kernel.org/stable/c/a899adf7063c6745aaff1ec869f3c7f6329ed0a1 |
| https://git.kernel.org/stable/c/ea3f18d2f02629653b7bfe42607737ccd1343e54 |
| https://git.kernel.org/stable/c/e53fc232a65f7488ab75d03a5b95f06aaada7262 |
