{"cve":"CVE-2026-89922","nvd":{"published":"2026-09-16T11:17:01.277","modified":"2026-10-19T09:18:37.693","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Take srcu when importing watchpoint data\n\n__import_wp_info() backs up the original guest memory contents of a\nwatchpoint with read_guest_abs(), which is kvm_read_guest() and therefore\nresolves the memslot via __kvm_memslots(). That requires kvm->srcu (or\nkvm->slots_lock) to be held, otherwise a concurrent memslot update can\nfree the memslots array under us once its SRCU grace period has elapsed.\n\nAs this is not fast path, following lock ordering (mutex first, then\nsrcu) take the big hammer and hold the srcu for the full import.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://git.kernel.org/stable/c/4c05bf21d1806853e662cc19e744736a3408f155","https://git.kernel.org/stable/c/6830fbc3724bf49c142aae69a4694f115fa9cedd","https://git.kernel.org/stable/c/76f5b4ea9ed0aa5a34bda9d8a878f2c73026ec03","https://git.kernel.org/stable/c/a4e482def8533ebace517d9f67f1465841b1f982","https://git.kernel.org/stable/c/cc710ee45395efb4937e042960f791d33924e5f6"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:54:41.405518556+00:00"},"epss":{"cve":"CVE-2026-89922","score":0.00164,"percentile":0.05579,"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."]}