---
id: CVE-2026-93260
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  powerpc/xive: propagate IPI init errors to prevent use-after-free

  When xive_init_ipis() fails (e.g
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  powerpc/xive: propagate IPI init errors to prevent use-after-free

  When xive_init_ipis() fails (e.g. irq_domain_alloc_irqs() fails),
  the error path frees the global xiv…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 243e25112d06b348f087a6f7aba4bbc288285bdd <
    c554a8d376d5aea1b237ed6bef6f9fbfc550e67f
  - >-
    Linux >= 243e25112d06b348f087a6f7aba4bbc288285bdd <
    411a3c016e7a95f5fa105a0587e07d0647a77727
  - Linux 4.12
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T05:17:01.133'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93260'
references:
  - url: 'https://git.kernel.org/stable/c/411a3c016e7a95f5fa105a0587e07d0647a77727'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c554a8d376d5aea1b237ed6bef6f9fbfc550e67f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.835Z'
---

## Overview

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

powerpc/xive: propagate IPI init errors to prevent use-after-free

When xive_init_ipis() fails (e.g. irq_domain_alloc_irqs() fails),
the error path frees the global xive_ipis array.  However,
xive_smp_probe() previously ignored this failure and proceeded to
call xive_setup_cpu_ipi(), which dereferences the already-freed
xive_ipis pointer -- a use-after-free.

Now that xive_smp_probe() returns int (previous patch), propagate
the error from xive_init_ipis() and xive_setup_cpu_ipi() through
xive_smp_probe().  Check the return value in both pnv_smp_probe()
and pSeries_smp_probe() so that IPI setup is aborted cleanly on
failure, avoiding the use-after-free.

## Remediation

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