CVE-2026-63919

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-63919

Key Details

CVE	CVE-2026-63919
CVSS Score / Version	8.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; 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:

xfrm: input: hold netns during deferred transport reinjection

Transport-mode reinjection stores a struct net pointer in skb->cb and

uses it later from xfrm_trans_reinject(). That pointer must stay valid

until the deferred callback runs.

Take a netns reference when queueing deferred reinjection work and drop

it after the callback completes. Use maybe_get_net() so the queueing

path does not revive a namespace that is already being torn down.

This keeps the existing workqueue design and fixes the netns lifetime

handling in one place for all users of xfrm_trans_queue_net(). (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-63919
CVE	https://www.cve.org/CVERecord?id=CVE-2026-63919

Source

Reference

NVD

CVE