CVE-2025-22027
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().
Does this matter?
Lower severity and a low EPSS score (0.15%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.15% probability · 5th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362, CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/15483afb930fc2f883702dc96f80efbe4055235ePatch
- https://git.kernel.org/stable/c/30ef7cfee752ca318d5902cb67b60d9797ccd378Patch
- https://git.kernel.org/stable/c/4db62b60af2ccdea6ac5452fd20e29587ed85f57Patch
- https://git.kernel.org/stable/c/8760da4b9d44c36b93b6e4cf401ec7fe520015bdPatch
- https://git.kernel.org/stable/c/adf0ddb914c9e5b3e50da4c97959e82de2df75c3Patch
- https://git.kernel.org/stable/c/e11652a6514ec805440c1bb3739e6c6236fffcc7Patch
- https://git.kernel.org/stable/c/f1d518c0bad01abe83c2df880274cb6a39f4a457Patch
- https://git.kernel.org/stable/c/f656cfbc7a293a039d6a0c7100e1c846845148c1Patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.