Bug 1970541 (CVE-2021-28693)

Summary: CVE-2021-28693 xen: arm: boot modules are not scrubbed (XSA-372)
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jforbes, m.a.young
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Hardware: All   
OS: Linux   
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Last Closed: 2021-06-10 21:04:08 UTC Type: ---
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Bug Depends On: 1970542    
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Description Guilherme de Almeida Suckevicz 2021-06-10 16:36:11 UTC 
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.

Reference:
https://xenbits.xen.org/xsa/advisory-372.html
Comment 1 Guilherme de Almeida Suckevicz 2021-06-10 16:36:30 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1970542]
Comment 2 Product Security DevOps Team 2021-06-10 21:04:08 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.