{"id":"CVE-2026-89988","title":"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","summary":"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_remov…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 376e242429bf8539ef39a080ac113c8799840b13 < 8f406205003f741225f620f0e357ca0de71d45e3","Linux >= 376e242429bf8539ef39a080ac113c8799840b13 < 630ed8734a02b992e8a97538179c2ece42c5210f","Linux >= 376e242429bf8539ef39a080ac113c8799840b13 < 518d9b5568bb06f86e4434f7a30faa9612ea91ad","Linux >= 376e242429bf8539ef39a080ac113c8799840b13 < 5da247e4d1e8661d4d6f997101d59967e8994e32","Linux >= 376e242429bf8539ef39a080ac113c8799840b13 < 6e62cf983a2bd547e6bbd3f935539233e5f97f8f","Linux >= 376e242429bf8539ef39a080ac113c8799840b13 < 0c4256196b3a105307e2235fbfd85e768bbcdd0f","Linux 3.16"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:18:22.680","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89988","references":[{"url":"https://git.kernel.org/stable/c/0c4256196b3a105307e2235fbfd85e768bbcdd0f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/518d9b5568bb06f86e4434f7a30faa9612ea91ad","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5da247e4d1e8661d4d6f997101d59967e8994e32","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/630ed8734a02b992e8a97538179c2ece42c5210f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6e62cf983a2bd547e6bbd3f935539233e5f97f8f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8f406205003f741225f620f0e357ca0de71d45e3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.951Z","epss":0.00164,"epssPercentile":0.06054,"slug":"CVE-2026-89988","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205055,"id":"CVE-2026-89988","ts":1789570704975,"field":"cvss","old":null,"new":"7.8"},{"seq":205054,"id":"CVE-2026-89988","ts":1789570704975,"field":"severity","old":"none","new":"high"}]}