{"cve":"CVE-2026-98653","nvd":{"published":"2026-10-18T16:17:18.580","modified":"2026-10-19T10:19:29.790","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Fix _gaccess_shadow_fault()\n\nIn some circumstances, it is possible that the page of nested guest\nmemory that is being shadowed is not present at all in the parent guest\ngmap. dat_entry_walk() will not find any leaf entry and return with\n-ENOENT, which will erroneously be propagated all the way to userspace.\n\nFix by manually calling gmap_link() on the memory of the nested guest\nthat is being shadowed if the mapping was not already present.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/94c43c7df46433ed4d1e18f13770b019ba977bd8","https://git.kernel.org/stable/c/faff4c8ff3dbec6d71b89dd281a0d17c4478fa44"],"products":[],"source":"nvd","synced_at":"2026-10-19T23:00:53.604569364+00:00"},"epss":{"cve":"CVE-2026-98653","score":0.00155,"percentile":0.04644,"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."]}