一、 漏洞 CVE-2022-48975 基础信息
漏洞标题
gpiolib:修复gpiochip_setup_dev()中的内存泄露问题
来源:AIGC 神龙大模型
漏洞描述信息
N/A
来源:AIGC 神龙大模型
CVSS信息
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
来源:AIGC 神龙大模型
漏洞类别
在移除最后引用时对内存的释放不恰当(内存泄露)
来源:AIGC 神龙大模型
漏洞标题
gpiolib: fix memory leak in gpiochip_setup_dev()
来源:美国国家漏洞数据库 NVD
漏洞描述信息
In the Linux kernel, the following vulnerability has been resolved: gpiolib: fix memory leak in gpiochip_setup_dev() Here is a backtrace report about memory leak detected in gpiochip_setup_dev(): unreferenced object 0xffff88810b406400 (size 512): comm "python3", pid 1682, jiffies 4295346908 (age 24.090s) backtrace: kmalloc_trace device_add device_private_init at drivers/base/core.c:3361 (inlined by) device_add at drivers/base/core.c:3411 cdev_device_add gpiolib_cdev_register gpiochip_setup_dev gpiochip_add_data_with_key gcdev_register() & gcdev_unregister() would call device_add() & device_del() (no matter CONFIG_GPIO_CDEV is enabled or not) to register/unregister device. However, if device_add() succeeds, some resource (like struct device_private allocated by device_private_init()) is not released by device_del(). Therefore, after device_add() succeeds by gcdev_register(), it needs to call put_device() to release resource in the error handle path. Here we move forward the register of release function, and let it release every piece of resource by put_device() instead of kfree(). While at it, fix another subtle issue, i.e. when gc->ngpio is equal to 0, we still call kcalloc() and, in case of further error, kfree() on the ZERO_PTR pointer, which is not NULL. It's not a bug per se, but rather waste of the resources and potentially wrong expectation about contents of the gdev->descs variable.
来源:美国国家漏洞数据库 NVD
CVSS信息
N/A
来源:美国国家漏洞数据库 NVD
漏洞类别
N/A
来源:美国国家漏洞数据库 NVD
漏洞标题
Linux kernel 安全漏洞
来源:中国国家信息安全漏洞库 CNNVD
漏洞描述信息
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞,该漏洞源于gpiolib组件在gpiochip_setup_dev中的内存泄漏。
来源:中国国家信息安全漏洞库 CNNVD
CVSS信息
N/A
来源:中国国家信息安全漏洞库 CNNVD
漏洞类别
其他
来源:中国国家信息安全漏洞库 CNNVD
二、漏洞 CVE-2022-48975 的公开POC
# POC 描述 源链接 神龙链接
三、漏洞 CVE-2022-48975 的情报信息
  • 标题: gpiolib: fix memory leak in gpiochip_setup_dev() - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

    标签:

    神龙速读
  • 标题: gpiolib: fix memory leak in gpiochip_setup_dev() - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

    标签:

    神龙速读
  • 标题: gpiolib: fix memory leak in gpiochip_setup_dev() - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

    标签:

    神龙速读
  • https://nvd.nist.gov/vuln/detail/CVE-2022-48975