Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and Xen, aka CID-cadfad870154.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Xen 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。Xen是英国剑桥大学的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 4.13.x及之前版本（x86 PV Guests）中使用的Linux kernel 5.5版本至5.7.9版本存在安全漏洞，该漏洞源于tss_invalidate_io_bitmap的错误处理造成TSS和Xen的I/O位图之间不再同步。攻击者可利用该漏洞
CVSS Information
N/A
Vulnerability Type
N/A