{"id":"CVE-2026-89988","summary":"kprobes: Protect kprobe_blacklist with RCU","details":"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.","modified":"2026-09-18T03:48:34.547043962Z","published":"2026-09-16T10:33:03.003Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89988.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0c4256196b3a105307e2235fbfd85e768bbcdd0f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/518d9b5568bb06f86e4434f7a30faa9612ea91ad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5da247e4d1e8661d4d6f997101d59967e8994e32"},{"type":"WEB","url":"https://git.kernel.org/stable/c/630ed8734a02b992e8a97538179c2ece42c5210f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e62cf983a2bd547e6bbd3f935539233e5f97f8f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8f406205003f741225f620f0e357ca0de71d45e3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89988.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89988"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"376e242429bf8539ef39a080ac113c8799840b13"},{"fixed":"8f406205003f741225f620f0e357ca0de71d45e3"},{"fixed":"630ed8734a02b992e8a97538179c2ece42c5210f"},{"fixed":"518d9b5568bb06f86e4434f7a30faa9612ea91ad"},{"fixed":"5da247e4d1e8661d4d6f997101d59967e8994e32"},{"fixed":"6e62cf983a2bd547e6bbd3f935539233e5f97f8f"},{"fixed":"0c4256196b3a105307e2235fbfd85e768bbcdd0f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89988.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89988.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}