CVE-2021-28693

Description

xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must "scrub" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.

5.5

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.06%

Vendor Advisory gentoo.org Vendor Advisory xenproject.org

Affected: Xen xen

References

Link	Tags
https://xenbits.xenproject.org/xsa/advisory-372.txt	vendor advisory
https://security.gentoo.org/glsa/202107-30	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-28693?: CVE-2021-28693 has been scored as a medium severity vulnerability.
How to fix CVE-2021-28693?: To fix CVE-2021-28693, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-28693 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-28693 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-28693?: CVE-2021-28693 affects Xen xen, Xen xen, Xen xen, Xen xen.

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