CVE-2026-72285
- Source
- https://cve.org/CVERecord?id=CVE-2026-72285
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72285.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-72285
- Downstream
- Published
- 2026-08-15T05:55:08.385Z
- Modified
- 2026-08-18T03:56:55.526346294Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- KVM: TDX: Reject concurrent change to CPUID entry count
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
KVM: TDX: Reject concurrent change to CPUID entry count
Reject KVMTDXINIT_VM if userspace changes cpuid.nent between the initial read and the subsequent copy of the initialization data.
tdxtdinit() first reads userdata->cpuid.nent to size the flexible kvmtdxinitvm 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. setuptdparamscpuids() later passes initvm->cpuid.nent to kvmfindcpuidentry2(), 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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72285.json" }- References
-
- https://git.kernel.org/stable/c/cfbebb55e5127dc162e73fa8956000055a78606c
- https://git.kernel.org/stable/c/d6b5aba65e99531c97b146622a406c75653819d5
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72285.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-72285
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git