{"id":"CVE-2026-89922","published":"2026-09-16T11:17:01.277","lastModified":"2026-09-16T15:18:18.357","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.","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/4c05bf21d1806853e662cc19e744736a3408f155","tags":[]},{"url":"https://git.kernel.org/stable/c/6830fbc3724bf49c142aae69a4694f115fa9cedd","tags":[]},{"url":"https://git.kernel.org/stable/c/76f5b4ea9ed0aa5a34bda9d8a878f2c73026ec03","tags":[]},{"url":"https://git.kernel.org/stable/c/a4e482def8533ebace517d9f67f1465841b1f982","tags":[]},{"url":"https://git.kernel.org/stable/c/cc710ee45395efb4937e042960f791d33924e5f6","tags":[]},{"url":"https://git.kernel.org/stable/c/f8e3a9997d5ecd56ebe4b262ff424516c068fecb","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This vulnerability allows a local attacker to exploit a race condition in the Linux kernel's KVM s390 implementation when importing watchpoint data, potentially leading to kernel memory corruption or privilege escalation.","exploitability":"Exploitation requires a local attacker with the ability to modify guest memory and a race condition window, making it moderately difficult.","blast_radius":"If exploited, the impact could be severe, potentially leading to arbitrary code execution or kernel memory corruption affecting the host system.","remediation":"Upgrade to the specific version 5.10.104 or later, as published by the Linux kernel maintainers.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["local-priv-escalation","kernel","s390","watchpoint","memory-corruption"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-08T08:43:03.904Z"}}