{"id":"CVE-2026-89988","published":"2026-09-16T11:17:09.890","lastModified":"2026-09-16T15:18:22.680","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: Protect kprobe_blacklist with RCU\n\n__within_kprobe_blacklist() traverses kprobe_blacklist without holding\nkprobe_mutex. When a module is unloaded, kprobe_remove_area_blacklist()\nremoves blacklist entries and immediately frees them with kfree().\nA concurrent call to within_kprobe_blacklist() can therefore dereference\nfreed memory.\n\nFurthermore, within_kprobe_blacklist() can be called in atomic or\nnon-preemptible contexts where the sleeping kprobe_mutex cannot be taken.\n\nProtect kprobe_blacklist with RCU. Use guard(rcu)() and\nlist_for_each_entry_rcu() for traversal, list_add_tail_rcu() for\ninsertions, list_del_rcu() for deletions, and kfree_rcu() to reclaim\nentries safely after a grace period.","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/0c4256196b3a105307e2235fbfd85e768bbcdd0f","tags":[]},{"url":"https://git.kernel.org/stable/c/518d9b5568bb06f86e4434f7a30faa9612ea91ad","tags":[]},{"url":"https://git.kernel.org/stable/c/5da247e4d1e8661d4d6f997101d59967e8994e32","tags":[]},{"url":"https://git.kernel.org/stable/c/630ed8734a02b992e8a97538179c2ece42c5210f","tags":[]},{"url":"https://git.kernel.org/stable/c/6e62cf983a2bd547e6bbd3f935539233e5f97f8f","tags":[]},{"url":"https://git.kernel.org/stable/c/8f406205003f741225f620f0e357ca0de71d45e3","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}