Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The vmw_gb_surface_define_ioctl function (accessible via DRM_IOCTL_VMW_GB_SURFACE_CREATE) in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel through 4.11.4 defines a backup_handle variable but does not give it an initial value. If one attempts to create a GB surface, with a previously allocated DMA buffer to be used as a backup buffer, the backup_handle variable does not get written to and is then later returned to user space, allowing local users to obtain sensitive information from uninitialized kernel memory via a crafted ioctl call.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux kernel 安全漏洞
Vulnerability Description
Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。 Linux kernel 4.11.4及之前的版本中的drivers/gpu/drm/vmwgfx/vmwgfx_surface.c文件的‘vmw_gb_surface_define_ioctl’函数存在安全漏洞。本地攻击者可借助特制的ioctl调用利用该漏洞获取未初始化内核内存中的敏感信息。
CVSS Information
N/A
Vulnerability Type
N/A