---
id: "CVE-2026-98932"
kind: "vulnerability"
aliases: ["CVE-2026-98932"]
title: "Linux kernel: Altera EDAC error path frees memory before IRQs unregister"
severity: "unknown"
cvss: null
epss: 0.00206
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["altera-soc", "edac", "embedded", "infrastructure", "linux-kernel"]
not_affected_if: ["driver-not-loaded", "no-altera-hardware"]
published_at: "2026-10-23T13:17:14+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-2026-98932", "first_seen_at": "2026-10-23T21:57:33+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-98932", "first_seen_at": "2026-10-25T12:38:50+00:00"}]
---

# Linux kernel: Altera EDAC error path frees memory before IRQs unregister

In the Linux kernel's Altera EDAC driver, error paths free a data structure before the managed interrupt handlers that use it are unregistered. An interrupt firing in that window can read freed memory, causing a use-after-free.

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

## How to check

- unknown

## Fix

- Install a Linux kernel release that includes the upstream fix for EDAC/altera use-after-free, per the kernel stable tree commits.

## Timeline

- 2026-10-23T21:57:33+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98932
- 2026-10-25T12:38:50+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-98932

## From the sources

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

EDAC/altera: Fix use-after-free in error paths

In both altr_edac_a10_device_add() and altr_portb_setup(), the error path
freed the dci structure before releasing the devres group. Since the managed
single and double bit IRQ handlers use altdev(dci->pvt_info) as their data, an
IRQ firing between freeing dci and unregistering the IRQs could dereference
the freed memory.

Release the devres group first so the managed IRQs are unregistered
before the dci structure is freed.

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