---
id: CVE-2023-53261
title: 'coresight: Fix memory leak in acpi_buffer->pointer'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  coresight: Fix memory leak in acpi_buffer->pointer

  There are memory leaks reported by kmemleak:
  ...
  unreferenced object 0xffff00213c141000 (size 1024):
    comm "systemd…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: adp
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 76ffa5ab5b79c250b9744b7f8bdd835db426a1ae <
    10bbb7efcad40a06d7acfc0a14af21c19b496eff
  - >-
    Linux >= 76ffa5ab5b79c250b9744b7f8bdd835db426a1ae <
    d1b60e7c9fee34eaedf1fc4e0471f75b33f83a4a
  - >-
    Linux >= 76ffa5ab5b79c250b9744b7f8bdd835db426a1ae <
    1a9e02673e2550f5612099e64e8761f0c8fc0f50
  - Linux 5.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-01-14T18:02:51.752323Z'
published: '2025-09-15'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T12:17:28.351Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-53261'
references:
  - url: 'https://git.kernel.org/stable/c/10bbb7efcad40a06d7acfc0a14af21c19b496eff'
  - url: 'https://git.kernel.org/stable/c/d1b60e7c9fee34eaedf1fc4e0471f75b33f83a4a'
  - url: 'https://git.kernel.org/stable/c/1a9e02673e2550f5612099e64e8761f0c8fc0f50'
tags:
  - cve.org
epss: 0.00146
epssPercentile: 0.03895
ingestedAt: '2026-11-03T11:43:15.785Z'
---

## Overview

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

coresight: Fix memory leak in acpi_buffer->pointer

There are memory leaks reported by kmemleak:
...
unreferenced object 0xffff00213c141000 (size 1024):
  comm "systemd-udevd", pid 2123, jiffies 4294909467 (age 6062.160s)
  hex dump (first 32 bytes):
    04 00 00 00 02 00 00 00 18 10 14 3c 21 00 ff ff  ...........<!...
    00 00 00 00 00 00 00 00 03 00 00 00 10 00 00 00  ................
  backtrace:
    [<000000004b7c9001>] __kmem_cache_alloc_node+0x2f8/0x348
    [<00000000b0fc7ceb>] __kmalloc+0x58/0x108
    [<0000000064ff4695>] acpi_os_allocate+0x2c/0x68
    [<000000007d57d116>] acpi_ut_initialize_buffer+0x54/0xe0
    [<0000000024583908>] acpi_evaluate_object+0x388/0x438
    [<0000000017b2e72b>] acpi_evaluate_object_typed+0xe8/0x240
    [<000000005df0eac2>] coresight_get_platform_data+0x1b4/0x988 [coresight]
...

The ACPI buffer memory (buf.pointer) should be freed. But the buffer
is also used after returning from acpi_get_dsd_graph().
Move the temporary variables buf to acpi_coresight_parse_graph(),
and free it before the function return to prevent memory leak.

## Affected

- `Linux >= 76ffa5ab5b79c250b9744b7f8bdd835db426a1ae < 10bbb7efcad40a06d7acfc0a14af21c19b496eff`
- `Linux >= 76ffa5ab5b79c250b9744b7f8bdd835db426a1ae < d1b60e7c9fee34eaedf1fc4e0471f75b33f83a4a`
- `Linux >= 76ffa5ab5b79c250b9744b7f8bdd835db426a1ae < 1a9e02673e2550f5612099e64e8761f0c8fc0f50`
- `Linux 5.3`

## Remediation

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