NFC：st21nfca：修复设备探测中的内存泄漏并删除 (CVE-2021-46924)

CVE编号

CVE-2021-46924

利用情况

暂无

补丁情况

N/A

披露时间

2024-02-27

漏洞描述

In the Linux kernel, the following vulnerability has been resolved: NFC: st21nfca: Fix memory leak in device probe and remove 'phy->pending_skb' is alloced when device probe, but forgot to free in the error handling path and remove path, this cause memory leak as follows: unreferenced object 0xffff88800bc06800 (size 512): comm "8", pid 11775, jiffies 4295159829 (age 9.032s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000d66c09ce>] __kmalloc_node_track_caller+0x1ed/0x450 [<00000000c93382b3>] kmalloc_reserve+0x37/0xd0 [<000000005fea522c>] __alloc_skb+0x124/0x380 [<0000000019f29f9a>] st21nfca_hci_i2c_probe+0x170/0x8f2 Fix it by freeing 'pending_skb' in error and remove.

解决建议

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c
https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b
https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe
https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d
https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349
https://git.kernel.org/stable/c/e553265ea56482da5700f56319fda9ff53e7dcb4

CVSS3评分 N/A

• 攻击路径 N/A
• 攻击复杂度 N/A
• 权限要求 N/A
• 影响范围 N/A
• 用户交互 N/A
• 可用性 N/A
• 保密性 N/A
• 完整性 N/A

N/A

CWE-ID	漏洞类型

Exp相关链接

- avd.aliyun.com