Medium [CVE-2026-72285] Reject concurrent change to CPUID entry count
This medium-severity Red Hat Linux advisory covers CVE-2026-72285 affecting Red Hat Enterprise Linux 10, Red Hat package: kernel.
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Summary
A flaw was found in the Linux kernel's KVM (Kernel-based Virtual Machine) TDX (Trust Domain Extensions) module. A local attacker, by concurrently modifying the CPUID entry count during the initialization of a virtual machine, could cause the CPUID parsing to access memory beyond the intended boundaries.
This out-of-bounds access could potentially lead to a denial of service or other undefined behavior within the virtualized environment. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 10.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: kernel.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
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