CVE-2023-46837

Summary

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.

Affected Software

VendorProductVersion RangeStatus
XenXenconsult Xen advisory XSA-447unknown

Weaknesses

Workarounds

There is no known mitigation.

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References