CVE-2026-68432

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-68432

Key Details

CVE	CVE-2026-68432
CVSS Score / Version	8.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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 changed; 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:

vxlan: require CAP_NET_ADMIN in the device netns for changelink

A tunnel changelink() operates on at most two netns, dev_net(dev) and

the sticky underlay netns vxlan->net. They differ once the device is

created in or moved to a netns other than the one the request runs in.

The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev),

so a caller privileged there but not in vxlan->net can rewrite a vxlan

device whose underlay lives in vxlan->net.

vxlan_changelink() validates and applies the new configuration against

vxlan->net (vxlan_config_validate(vxlan->net, ...)) and can reopen the

underlay socket in that netns, so the same reasoning as the tunnel

changelink series applies here.

Gate vxlan_changelink() with rtnl_dev_link_net_capable(), at the top of

the op before any attribute is parsed, matching ipgre_changelink() and

the rest of the "require CAP_NET_ADMIN in the device netns for

changelink" series.

Found by 0sec automated security-research tooling (https://0sec.ai). (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-68432
CVE	https://www.cve.org/CVERecord?id=CVE-2026-68432

Source

Reference

NVD

CVE