---
id: CVE-2026-72223
title: 'nvdimm/btt: Free arena sub-allocations on discover_arenas() error path'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nvdimm/btt: Free arena sub-allocations on discover_arenas() error path

  Memory allocated by btt_freelist_init(), btt_rtt_init(), and
  btt_maplocks_init() is not freed on…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 <
    2d0364937550a7b3e2592629c2a68753ac020b28
  - >-
    Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 <
    eeb95774bc79268e2b78ebf01d8781560b5bd671
  - >-
    Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 <
    7563f69caa9143a491d5f26e563255c734751545
  - >-
    Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 <
    0b0d9404951aacc9717aa61e77af4a6e9e8f8249
  - >-
    Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 <
    873ced7f345e99f7ee16f9ff226515580332ecc4
  - >-
    Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 <
    30d490bb2c4cd220e7dedf862ab6a09eb5dcbad5
  - >-
    Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 <
    ba59b96d8d21dc8729fca44a022ca5919c1848c9
  - >-
    Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 <
    13fe4cd9ddd0aacb7777812328be525a11ea3fea
  - Linux 4.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:52:54.485986Z'
published: '2026-08-15'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:55:22.661Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72223'
references:
  - url: 'https://git.kernel.org/stable/c/2d0364937550a7b3e2592629c2a68753ac020b28'
  - url: 'https://git.kernel.org/stable/c/eeb95774bc79268e2b78ebf01d8781560b5bd671'
  - url: 'https://git.kernel.org/stable/c/7563f69caa9143a491d5f26e563255c734751545'
  - url: 'https://git.kernel.org/stable/c/0b0d9404951aacc9717aa61e77af4a6e9e8f8249'
  - url: 'https://git.kernel.org/stable/c/873ced7f345e99f7ee16f9ff226515580332ecc4'
  - url: 'https://git.kernel.org/stable/c/30d490bb2c4cd220e7dedf862ab6a09eb5dcbad5'
  - url: 'https://git.kernel.org/stable/c/ba59b96d8d21dc8729fca44a022ca5919c1848c9'
  - url: 'https://git.kernel.org/stable/c/13fe4cd9ddd0aacb7777812328be525a11ea3fea'
tags:
  - cve.org
epss: 0.0022
epssPercentile: 0.12539
ingestedAt: '2026-11-06T18:00:12.587Z'
---

## Overview

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

nvdimm/btt: Free arena sub-allocations on discover_arenas() error path

Memory allocated by btt_freelist_init(), btt_rtt_init(), and
btt_maplocks_init() is not freed on some discover_arenas() error
paths. This leaks memory when arena discovery fails.

Add the missing kfree() calls to release the allocations before
returning an error.

[ as: commit message and log edits ]

## Affected

- `Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 < 2d0364937550a7b3e2592629c2a68753ac020b28`
- `Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 < eeb95774bc79268e2b78ebf01d8781560b5bd671`
- `Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 < 7563f69caa9143a491d5f26e563255c734751545`
- `Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 < 0b0d9404951aacc9717aa61e77af4a6e9e8f8249`
- `Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 < 873ced7f345e99f7ee16f9ff226515580332ecc4`
- `Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 < 30d490bb2c4cd220e7dedf862ab6a09eb5dcbad5`
- `Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 < ba59b96d8d21dc8729fca44a022ca5919c1848c9`
- `Linux >= 5212e11fde4d40fa627668b4f2222d20db488f71 < 13fe4cd9ddd0aacb7777812328be525a11ea3fea`
- `Linux 4.2`

## Remediation

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