CVE-2026-90191

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-90191

Key Details

CVE	CVE-2026-90191
CVSS Score / Version	8.4 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; 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:

mailbox: riscv-sbi-mpxy: validate RPMI notification lengths

The SBI return value controls how many bytes are copied from shared

memory into the RPMI notification buffer. It is not validated against

the negotiated shared-memory size before that copy. The event walker

also uses a reversed loop condition and can inspect a short event record.

Validate the complete notification length before copying it, iterate only

while a full event header remains, and stop when a declared event payload

extends beyond the copied notification data. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90191
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90191

Source

Reference

NVD

CVE