---
id: CVE-2026-98447
title: 'xfs: fix wild memcpy access when formatting ondisk rtrefcount btree roots'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  xfs: fix wild memcpy access when formatting ondisk rtrefcount btree roots

  LOLLM noticed that the inode btree root formatting methods copy too many
  bytes -- there's onl…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= f0415af60f482a2192065be8b334b409495ca8a3 <
    d46492fb8018d12d00651b06b9d240e747110b38
  - >-
    Linux >= f0415af60f482a2192065be8b334b409495ca8a3 <
    2703b954d306ebfe3b11e33e259759329c11b690
  - >-
    Linux >= f0415af60f482a2192065be8b334b409495ca8a3 <
    fe2f9135df43db849e74f03956d322ac20b59af7
  - Linux 6.14
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:14:57.561Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98447'
references:
  - url: 'https://git.kernel.org/stable/c/d46492fb8018d12d00651b06b9d240e747110b38'
  - url: 'https://git.kernel.org/stable/c/2703b954d306ebfe3b11e33e259759329c11b690'
  - url: 'https://git.kernel.org/stable/c/fe2f9135df43db849e74f03956d322ac20b59af7'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.306Z'
---

## Overview

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

xfs: fix wild memcpy access when formatting ondisk rtrefcount btree roots

LOLLM noticed that the inode btree root formatting methods copy too many
bytes -- there's only one set of keys in node blocks, not two.  This
causes memory corruption of whatever's beyond the buffers.

## Affected

- `Linux >= f0415af60f482a2192065be8b334b409495ca8a3 < d46492fb8018d12d00651b06b9d240e747110b38`
- `Linux >= f0415af60f482a2192065be8b334b409495ca8a3 < 2703b954d306ebfe3b11e33e259759329c11b690`
- `Linux >= f0415af60f482a2192065be8b334b409495ca8a3 < fe2f9135df43db849e74f03956d322ac20b59af7`
- `Linux 6.14`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.