---
id: "CVE-2026-98892"
kind: "vulnerability"
aliases: ["CVE-2026-98892"]
title: "Linux kernel: short SCMI error-event payloads read past the buffer"
severity: "unknown"
cvss: null
epss: 0.00215
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["arm", "infrastructure", "linux-kernel", "scmi"]
not_affected_if: ["no-arm-scmi-firmware"]
published_at: "2026-10-23T12:18:23+00:00"
first_seen_at: "2026-10-23T21:57:33+00:00"
updated_at: "2026-10-25T12:38:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98892", "first_seen_at": "2026-10-23T21:57:33+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-98892", "first_seen_at": "2026-10-25T12:38:50+00:00"}]
---

# Linux kernel: short SCMI error-event payloads read past the buffer

The Linux kernel's ARM SCMI firmware driver trusted an error count in a BASE_ERROR_EVENT notification without checking the payload actually contained that many reports. A truncated payload makes the kernel copy past the received data, which can crash it or leak adjacent memory.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Fix

- Move to a Linux kernel release that includes the fix for firmware: arm_scmi: Validate BASE_ERROR_EVENT payload size; the sources do not name the version.
- Check the kernel version with `uname -r` and compare against your distribution's advisory.

## Timeline

- 2026-10-23T21:57:33+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98892
- 2026-10-25T12:38:50+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-98892

## From the sources

In the Linux kernel, the following vulnerability has been resolved:

firmware: arm_scmi: Validate BASE_ERROR_EVENT payload size

BASE_ERROR_EVENT carries a variable number of message reports,
with the count encoded in error_status. The notification parser used
that count without checking whether the received payload contained all
reported entries.

Reject truncated payloads before copying the report array.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_