| 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-2025-22027: media: streamzap: fix race between device disconnection and urb callback |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| media: streamzap: fix race between device disconnection and urb callback |
| |
| Syzkaller has reported a general protection fault at function |
| ir_raw_event_store_with_filter(). This crash is caused by a NULL pointer |
| dereference of dev->raw pointer, even though it is checked for NULL in |
| the same function, which means there is a race condition. It occurs due |
| to the incorrect order of actions in the streamzap_disconnect() function: |
| rc_unregister_device() is called before usb_kill_urb(). The dev->raw |
| pointer is freed and set to NULL in rc_unregister_device(), and only |
| after that usb_kill_urb() waits for in-progress requests to finish. |
| |
| If rc_unregister_device() is called while streamzap_callback() handler is |
| not finished, this can lead to accessing freed resources. Thus |
| rc_unregister_device() should be called after usb_kill_urb(). |
| |
| Found by Linux Verification Center (linuxtesting.org) with Syzkaller. |
| |
| The Linux kernel CVE team has assigned CVE-2025-22027 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.36 with commit 8e9e60640067858e8036d4d43bbf725c60613359 and fixed in 5.10.237 with commit e11652a6514ec805440c1bb3739e6c6236fffcc7 |
| Issue introduced in 2.6.36 with commit 8e9e60640067858e8036d4d43bbf725c60613359 and fixed in 5.15.181 with commit f1d518c0bad01abe83c2df880274cb6a39f4a457 |
| Issue introduced in 2.6.36 with commit 8e9e60640067858e8036d4d43bbf725c60613359 and fixed in 6.1.134 with commit 30ef7cfee752ca318d5902cb67b60d9797ccd378 |
| Issue introduced in 2.6.36 with commit 8e9e60640067858e8036d4d43bbf725c60613359 and fixed in 6.6.87 with commit 15483afb930fc2f883702dc96f80efbe4055235e |
| Issue introduced in 2.6.36 with commit 8e9e60640067858e8036d4d43bbf725c60613359 and fixed in 6.12.23 with commit adf0ddb914c9e5b3e50da4c97959e82de2df75c3 |
| Issue introduced in 2.6.36 with commit 8e9e60640067858e8036d4d43bbf725c60613359 and fixed in 6.13.11 with commit 4db62b60af2ccdea6ac5452fd20e29587ed85f57 |
| Issue introduced in 2.6.36 with commit 8e9e60640067858e8036d4d43bbf725c60613359 and fixed in 6.14.2 with commit 8760da4b9d44c36b93b6e4cf401ec7fe520015bd |
| Issue introduced in 2.6.36 with commit 8e9e60640067858e8036d4d43bbf725c60613359 and fixed in 6.15 with commit f656cfbc7a293a039d6a0c7100e1c846845148c1 |
| |
| 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-2025-22027 |
| 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/rc/streamzap.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/e11652a6514ec805440c1bb3739e6c6236fffcc7 |
| https://git.kernel.org/stable/c/f1d518c0bad01abe83c2df880274cb6a39f4a457 |
| https://git.kernel.org/stable/c/30ef7cfee752ca318d5902cb67b60d9797ccd378 |
| https://git.kernel.org/stable/c/15483afb930fc2f883702dc96f80efbe4055235e |
| https://git.kernel.org/stable/c/adf0ddb914c9e5b3e50da4c97959e82de2df75c3 |
| https://git.kernel.org/stable/c/4db62b60af2ccdea6ac5452fd20e29587ed85f57 |
| https://git.kernel.org/stable/c/8760da4b9d44c36b93b6e4cf401ec7fe520015bd |
| https://git.kernel.org/stable/c/f656cfbc7a293a039d6a0c7100e1c846845148c1 |
