CVE-2026-89988

HIGH

MEDIUM Priority: 0.01 BB Relevance: 41/100

Published: 2026-09-16 Modified: 2026-10-30 First seen: 2026-10-30 Status: active

Attack Surface

Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local

AC: Low

PR: Low

UI: None

S: Unchanged

C: High

I: High

A: High

Description

In the Linux kernel, the following vulnerability has been resolved: kprobes: Protect kprobe_blacklist with RCU __within_kprobe_blacklist() traverses kprobe_blacklist without holding kprobe_mutex. When a module is unloaded, kprobe_remove_area_blacklist() removes blacklist entries and immediately frees them with kfree(). A concurrent call to within_kprobe_blacklist() can therefore dereference freed memory. Furthermore, within_kprobe_blacklist() can be called in atomic or non-preemptible contexts where the sleeping kprobe_mutex cannot be taken. Protect kprobe_blacklist with RCU. Use guard(rcu)() and list_for_each_entry_rcu() for traversal, list_add_tail_rcu() for insertions, list_del_rcu() for deletions, and kfree_rcu() to reclaim entries safely after a grace period.

Affected Software (9)

Vendor	Product	Version
Linux	Linux	376e242429bf8539ef39a080ac113c8799840b13 < 3fb8386682ef4d0858c38bf0d8d8a47ba171fa23
Linux	Linux	376e242429bf8539ef39a080ac113c8799840b13 < 5d97a13defc648c64d138145ace429b6a3d08943
Linux	Linux	376e242429bf8539ef39a080ac113c8799840b13 < 8f406205003f741225f620f0e357ca0de71d45e3
Linux	Linux	376e242429bf8539ef39a080ac113c8799840b13 < 630ed8734a02b992e8a97538179c2ece42c5210f
Linux	Linux	376e242429bf8539ef39a080ac113c8799840b13 < 518d9b5568bb06f86e4434f7a30faa9612ea91ad
Linux	Linux	376e242429bf8539ef39a080ac113c8799840b13 < 5da247e4d1e8661d4d6f997101d59967e8994e32
Linux	Linux	376e242429bf8539ef39a080ac113c8799840b13 < 6e62cf983a2bd547e6bbd3f935539233e5f97f8f
Linux	Linux	376e242429bf8539ef39a080ac113c8799840b13 < 0c4256196b3a105307e2235fbfd85e768bbcdd0f
Linux	Linux	3.16