CVE-2023-46837: arm32: The cache may not be properly cleaned/invalidated (take two)
First published: Tue Dec 12 2023(Updated: )
Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory. This undefined behavior was meant to be addressed by XSA-437, but the approach was not sufficient.
Credit: security@xen.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Xen Xen | <=4.16 |
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Reference Links
- https://xenbits.xenproject.org/xsa/advisory-447.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XLL6SQ6IKFYXLYWITYZCRV5IBRK5G35R/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JFVKWYQFRUU3CAS53THTUKXEOUDWI42G/
- collector/oss-sec
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- vendor/xen
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