{"cve":"CVE-2026-89438","nvd":{"published":"2026-09-11T20:19:24.087","modified":"2026-10-19T09:17:35.677","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: ISST: Validate logical CPU id and clos id\n\nValidate max CLOS ID and logical CPU ID for core power feature.\nReject any clos level or logical CPU number greater than the\nsupported maximum. These are used to calculate MMIO offset.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/0d601126c7afda9bb94dfecc8b2c0a16f20d76cb","https://git.kernel.org/stable/c/124e2dbabe460c2a6e7440f4ad8af560131295c9","https://git.kernel.org/stable/c/5b032e1dda486ca41d10536bd195bd8a559af1e2","https://git.kernel.org/stable/c/82d4afadb02fb4d7d7bb9230900904c10e49ec87","https://git.kernel.org/stable/c/c9ee2770eb95ba316a56d776b2b66666b70c194b"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-89438","score":0.00206,"percentile":0.10455,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}