{"id":"CVE-2026-89922","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-89922","summary":"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…","details":"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.","published":"2026-09-16T11:17:01.277","modified":"2026-09-16T11:17:01.277","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4c05bf21d1806853e662cc19e744736a3408f155"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6830fbc3724bf49c142aae69a4694f115fa9cedd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/76f5b4ea9ed0aa5a34bda9d8a878f2c73026ec03"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a4e482def8533ebace517d9f67f1465841b1f982"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc710ee45395efb4937e042960f791d33924e5f6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f8e3a9997d5ecd56ebe4b262ff424516c068fecb"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T11:17:01.277"}}