{"cve":"CVE-2026-98164","nvd":{"published":"2026-09-29T13:17:53.710","modified":"2026-10-07T07:17:03.147","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86/mmu: Check write tracking in all address spaces\n\nkvm_gfn_is_write_tracked() checks only the supplied memslot, but page\ntracking is per-address-space and shadow pages are shared across all\naddress spaces.  With SMM, a GFN can therefore be write-tracked in one\naddress space and appear untracked through the other.\n\nCheck the supplied slot first, then the slot for the other address space.\nThis ensures all callers honor write tracking regardless of the active\naddress space.  In particular, it prevents mmu_try_to_unsync_pages() from\nmarking an upper-level shadow page unsync and eventually triggering the\nBUG in pte_list_remove().\n\n[invert direction of the conditional. - Paolo]","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-670"],"references":["https://git.kernel.org/stable/c/09aa68552d2542cc6c23edd1568ac265dc5d886f","https://git.kernel.org/stable/c/0f38453cdb2e17566ccb7c0f3dabd5bd21caca26","https://git.kernel.org/stable/c/429b6f43b4d8c98988fdca99e02dc156134e3d77","https://git.kernel.org/stable/c/c0a9bd5fca0b5f2dea32b0fc31350e71e8648112","https://git.kernel.org/stable/c/d8636c8f9f95d0fd1e2f6f1cad0d5757aa6f212a"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:56:48.555445741+00:00"},"epss":{"cve":"CVE-2026-98164","score":0.00153,"percentile":0.0437,"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."]}