CVE-2021-47239

Katalog CVE

CVSS 7.8 · High EPSS 0,23%

Kerentanan Use After Free pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: net: usb: fix possible use-after-free in smsc75xx_bind The commit 46a8b29c6306 ("net: usb: fix memory leak in smsc75xx_bind") fails to clean up the work scheduled in smsc75xx_reset-> smsc75xx_set_multicast, which leads to use-after-free if the work is scheduled to start after the deallocation. In addition, this patch also removes a dangling pointer - dev->data[0]. This patch calls cancel_work_sync to cancel the scheduled work and set the dangling pointer to NULL.

Rincian

Terbit di NVD

21 Mei 2024

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-416: Use After Free

EPSS (30 hari)

0,23% peluang dieksploitasi; lebih tinggi dari 12,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/14616c372a7be01a2fb8c56c9d8debd232b9e43d patch
• https://git.kernel.org/stable/c/2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59b patch
• https://git.kernel.org/stable/c/4252bf6c2b245f47011098113d405ffad6ad5d5b patch
• https://git.kernel.org/stable/c/56b786d86694e079d8aad9b314e015cd4ac02a3d patch
• https://git.kernel.org/stable/c/570a52cf3e01d19f7fd1a251dfc52b0cd86c13cb patch
• https://git.kernel.org/stable/c/64160d1741a3de5204d1a822e058e0b4cc526504 patch
• https://git.kernel.org/stable/c/7cc8b2e05fcea6edd022d26e82091d781af8fd9b patch
• https://git.kernel.org/stable/c/c4e3be2e7742863e454ce31faf8fd0109c00050b patch