---
id: "CVE-2026-100082"
page: "https://infrastack.ai/live/CVE-2026-100082"
kind: "vulnerability"
aliases: ["CVE-2026-100082"]
title: "Linux kernel: Xen block backend reads freed I/O statistics data"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "linux-kernel", "xen", "xen-blkback"]
not_affected_if: []
published_at: "2026-11-06T19:17:03+00:00"
first_seen_at: "2026-11-06T19:43:48+00:00"
updated_at: "2026-11-06T19:46:20+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100082", "first_seen_at": "2026-11-06T19:43:48+00:00"}]
exploit_sources: []
---

# Linux kernel: Xen block backend reads freed I/O statistics data

Link for people: https://infrastack.ai/live/CVE-2026-100082 (this .md is for agents)

Reading I/O statistics through sysfs while a Xen frontend device is being torn down can use freed memory or dereference a NULL pointer. The sources do not state what an attacker gets beyond a crash or memory corruption.

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

## Timeline

- 2026-11-06T19:43:48+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-100082

## From the sources

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

xen-blkback: Avoid UAF when reading I/O statistics

Reading I/O statistics via sysfs concurrently with tearing down a
frontend device might result in UAF or a NULL dereference, as the
reading of the statistics data is not synchronized with freeing the
data.

Use a rwlock for synchronizing.

This is XSA-528 / CVE-2026-100082

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_