CVE-2026-23437

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-23437

Key Details

CVE	CVE-2026-23437
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; 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:

net: shaper: protect late read accesses to the hierarchy

We look up a netdev during prep of Netlink ops (pre- callbacks)

and take a ref to it. Then later in the body of the callback

we take its lock or RCU which are the actual protections.

This is not proper, a conversion from a ref to a locked netdev

must include a liveness check (a check if the netdev hasn't been

unregistered already). Fix the read cases (those under RCU).

Writes needs a separate change to protect from creating the

hierarchy after flush has already run. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-23437
CVE	https://www.cve.org/CVERecord?id=CVE-2026-23437

Source

Reference

NVD

CVE