# CVE-2026-72285: linux: In the Linux kernel, the following vulnerability has been resolved:  KVM: TDX: Reject concurrent change to CPUID entr...

CVE-2026-72285 is fixed in linux on 1 platform by DEBIAN-CVE-2026-72285 (version 7.1.5-1), released August 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-72285
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  KVM: TDX: Reject concurrent change to CPUID entry count  Reject KVM_TDX_INIT_VM if userspace changes cpuid.nent between the initial read and the subsequent copy of the initialization data.  tdx_td_init() first reads user_data->cpuid.nent to size the flexible kvm_tdx_init_vm copy.  The copied structure also contains cpuid.nent, and that field can differ from the value used to size the allocation if userspace modifies the input concurrently.  setup_tdparams_cpuids() later passes init_vm->cpuid.nent to kvm_find_cpuid_entry2(), which uses it as the array bound for the copied entries.  Require the copied count to match the value used to size the allocation so that CPUID parsing cannot access beyond the entries actually copied.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-72285](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72285.md) | Aug 15, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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