CVE-2026-62433: correct buffer checks for DM_OP hypercalls
Parts of the DMOP handling code assumes the caller has provided the required number of buffers for the given operation without any checking being done. As a result, certain operations might access stack rubble as structures are possibly uninitialized.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-62433?
CVE-2026-62433 has a risk score of 37, indicating a moderate risk due to improper buffer checks.
How do I fix CVE-2026-62433?
To fix CVE-2026-62433, ensure that the DM_OP handling code performs proper checks on the number of buffers provided by the caller.
What are the potential impacts of CVE-2026-62433?
CVE-2026-62433 could lead to accessing uninitialized stack memory, potentially allowing for arbitrary memory access.
Which systems are affected by CVE-2026-62433?
CVE-2026-62433 affects systems utilizing DM_OP hypercalls without sufficient buffer checks in the Xen hypervisor.
Has CVE-2026-62433 been published?
Yes, CVE-2026-62433 was published on July 28, 2026.