CVE-2026-31721

Katalog CVE

CVSS 5.5 · Medium EPSS 0,16%

Kerentanan pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: move list and spinlock inits from bind to alloc There was an issue when you did the following: - setup and bind an hid gadget - open /dev/hidg0 - use the resulting fd in EPOLL_CTL_ADD - unbind the UDC - bind the UDC - use the fd in EPOLL_CTL_DEL When CONFIG_DEBUG_LIST was enabled, a list_del corruption was reported within remove_wait_queue (via ep_remove_wait_queue). After some debugging I found out that the queues, which f_hid registers via poll_wait were the problem. These were initialized using init_waitqueue_head inside hidg_bind. So effectively, the bind function re-initialized the queues while there were still items in them. The solution is to move the initialization from hidg_bind to hidg_alloc to extend their lifetimes to the lifetime of the function instance. Additionally, I found many other possibly problematic init calls in the bind function, which I moved as well.

Rincian

Terbit di NVD

1 Mei 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

5.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

EPSS (30 hari)

0,16% peluang dieksploitasi; lebih tinggi dari 5,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/13440c0db227c5db01da751ed966dde4cdd2ea18 patch
• https://git.kernel.org/stable/c/26a879a41ed960b3fb4ec773ef2788c515c0e488 patch
• https://git.kernel.org/stable/c/4e0a88254ad59f6c53a34bf5fa241884ec09e8b2 patch
• https://git.kernel.org/stable/c/5d1bb391ceeebb28327703dd07af8c6324af298f patch
• https://git.kernel.org/stable/c/81aee4500055876883658b024b6fb61801afe134 patch
• https://git.kernel.org/stable/c/8ec6a58586f195a88479edcdb0b8027c39f12d03 patch
• https://git.kernel.org/stable/c/de93e0862169b5539e00c2b9980b93fd80c37c0d patch
• https://git.kernel.org/stable/c/f7d00ee1c8082c8a134340aaf16d71a27e29c362 patch