CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 5.5. See the original NVD description below for full technical details.
CVE
CVE-2021-26933
Severity
MEDIUM
CVSS
5.5
EPSS
0.33%
Original NVD Description
An issue was discovered in Xen 4.9 through 4.14.x. On Arm, a guest is allowed to control whether memory accesses are bypassing the cache. This means that Xen needs to ensure that all writes (such as the ones during scrubbing) have reached the memory before handing over the page to a guest. Unfortunately, the operation to clean the cache is happening before checking if the page was scrubbed. Therefore there is no guarantee when all the writes will reach the memory.
Related CVEs
Other vulnerabilities affecting the same vendor(s)