CVE-2026-72436

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-72436

Key Details

CVE	CVE-2026-72436
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types

Sashiko pointed out that there are a few lockless RCU readers

using test_bit() which is a relaxed atomic operation and

provides no memory barrier guarantees. Use test_bit_acquire()

instead where the operation may run parallel with add/del/gc,

i.e. is not one from the next cases

- protected by region lock

- in a set destroy phase

- in a new/temporary set creation phase (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-72436
CVE	https://www.cve.org/CVERecord?id=CVE-2026-72436

Source

Reference

NVD

CVE