CVE-2026-89988

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0c4256196b3a105307e2235fbfd85e768bbcdd0f
https://git.kernel.org/stable/c/518d9b5568bb06f86e4434f7a30faa9612ea91ad
https://git.kernel.org/stable/c/5da247e4d1e8661d4d6f997101d59967e8994e32
https://git.kernel.org/stable/c/630ed8734a02b992e8a97538179c2ece42c5210f
https://git.kernel.org/stable/c/6e62cf983a2bd547e6bbd3f935539233e5f97f8f
https://git.kernel.org/stable/c/8f406205003f741225f620f0e357ca0de71d45e3

Configurations

No configuration.

History

16 Sep 2026, 15:18

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8

Information

Published : 2026-09-16 11:17

Updated : 2026-09-16 15:18

NVD link : CVE-2026-89988

Mitre link : CVE-2026-89988

CVE.ORG link : CVE-2026-89988

JSON object : View

Products Affected

No product.

CWE

No CWE.

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