CVE-2026-90231

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-90231

Key Details

CVE	CVE-2026-90231
CVSS Score / Version	8.4 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N`
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 none.
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:

apparmor: fix unconfined user namespace restriction forced stack

If a task is already confined by a stack the unprivileged transition

restriction on unconfined is not correctly, applied. This results in

an escape if two transitions through an unconfined profile can be

executed.

Fix this by pushing the check into the per profile label build. The

check will always be done against unconfined and result in a stack of

just the unconfined component when necessary. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90231
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90231

Source

Reference

NVD

CVE