---
id: CVE-2026-43148
title: 'powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()

  As kcalloc() may fail, check its return value to avoid a NULL pointer
  dereference when passing it…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 <
    1de31dba19c3cd0c1caf388a286b46df638f0b91
  - >-
    Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 <
    b265e53d9adfbb5751713185843f7188aa9dd066
  - >-
    Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 <
    9d0ca11258e7b452653d04310addfec1753de1a2
  - >-
    Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 <
    ca46d2092f307385a7acfb42632056570d6dbbbc
  - >-
    Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 <
    9b85c8f624b0f8cf9b932f5a65dacd56a1f47a72
  - >-
    Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 <
    8b221db0b7d24675e465e98d9326d298025a4e8d
  - >-
    Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 <
    33c1c6d8a28a2761ac74b0380b2563cf546c2a3a
  - Linux 5.11
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T15:29:41.722516Z'
published: '2026-05-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T15:32:33.862Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43148'
references:
  - url: 'https://git.kernel.org/stable/c/1de31dba19c3cd0c1caf388a286b46df638f0b91'
  - url: 'https://git.kernel.org/stable/c/b265e53d9adfbb5751713185843f7188aa9dd066'
  - url: 'https://git.kernel.org/stable/c/9d0ca11258e7b452653d04310addfec1753de1a2'
  - url: 'https://git.kernel.org/stable/c/ca46d2092f307385a7acfb42632056570d6dbbbc'
  - url: 'https://git.kernel.org/stable/c/9b85c8f624b0f8cf9b932f5a65dacd56a1f47a72'
  - url: 'https://git.kernel.org/stable/c/8b221db0b7d24675e465e98d9326d298025a4e8d'
  - url: 'https://git.kernel.org/stable/c/33c1c6d8a28a2761ac74b0380b2563cf546c2a3a'
tags:
  - cve.org
epss: 0.00128
epssPercentile: 0.02472
ingestedAt: '2026-11-06T15:54:04.010Z'
---

## Overview

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

powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()

As kcalloc() may fail, check its return value to avoid a NULL pointer
dereference when passing it to of_property_read_u32_array().

## Affected

- `Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 < 1de31dba19c3cd0c1caf388a286b46df638f0b91`
- `Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 < b265e53d9adfbb5751713185843f7188aa9dd066`
- `Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 < 9d0ca11258e7b452653d04310addfec1753de1a2`
- `Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 < ca46d2092f307385a7acfb42632056570d6dbbbc`
- `Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 < 9b85c8f624b0f8cf9b932f5a65dacd56a1f47a72`
- `Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 < 8b221db0b7d24675e465e98d9326d298025a4e8d`
- `Linux >= 790a1662d3a26fe9fa5f691386d8fde6bb8b0dc2 < 33c1c6d8a28a2761ac74b0380b2563cf546c2a3a`
- `Linux 5.11`

## Remediation

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