Bug 1970541 (CVE-2021-28693) - CVE-2021-28693 xen: arm: boot modules are not scrubbed (XSA-372)
Summary: CVE-2021-28693 xen: arm: boot modules are not scrubbed (XSA-372)
Alias: CVE-2021-28693
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1970542
TreeView+ depends on / blocked
Reported: 2021-06-10 16:36 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-06-10 21:04 UTC (History)
2 users (show)

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Last Closed: 2021-06-10 21:04:08 UTC

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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.


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.

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