CVE-2026-89988kprobes: Protect kprobe_blacklist with RCU
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 376e242429bf8539ef39a080ac113c8799840b13 builds before 8f406205003f741225f620f0e357ca0de71d45e3; from 376e242429bf8539ef39a080ac113c8799840b13 before 630ed8734a02b992e8a97538179c2ece42c5210f; from 376e242429bf8539ef39a080ac113c8799840b13 before 518d9b5568bb06f86e4434f7a30faa9612ea91ad; 376e242429bf8539ef39a080ac113c8799840b13 builds before 5da247e4d1e8661d4d6f997101d59967e8994e32; 376e242429bf8539ef39a080ac113c8799840b13 builds before 6e62cf983a2bd547e6bbd3f935539233e5f97f8f; 376e242429bf8539ef39a080ac113c8799840b13 builds before 0c4256196b3a105307e2235fbfd85e768bbcdd0f | CNA record |
References
- https://git.kernel.org/stable/c/8f406205003f741225f620f0e357ca0de71d45e3
- https://git.kernel.org/stable/c/630ed8734a02b992e8a97538179c2ece42c5210f
- https://git.kernel.org/stable/c/518d9b5568bb06f86e4434f7a30faa9612ea91ad
- https://git.kernel.org/stable/c/5da247e4d1e8661d4d6f997101d59967e8994e32
- https://git.kernel.org/stable/c/6e62cf983a2bd547e6bbd3f935539233e5f97f8f
- https://git.kernel.org/stable/c/0c4256196b3a105307e2235fbfd85e768bbcdd0f
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.