---
id: CVE-2026-93246
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity

  rvu_register_interrupts() walks every MSI-X vector and uses strstr()
  to match "Mbox" or "FLR" in irq_na…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity

  rvu_register_interrupts() walks every MSI-X vector and uses strstr()
  to match "Mbox" or "FLR" in irq_na…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4e527f1e5c155ce28164ba34cad47b635d16f827 <
    2f460aa0211e97c011ef0cfe5016f8f2a2ed059b
  - >-
    Linux >= 4e527f1e5c155ce28164ba34cad47b635d16f827 <
    4d5df98369c5f45710b786499f8bd7ffc3196433
  - Linux 7.1
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T16:17:20.647'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93246'
references:
  - url: 'https://git.kernel.org/stable/c/2f460aa0211e97c011ef0cfe5016f8f2a2ed059b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4d5df98369c5f45710b786499f8bd7ffc3196433'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.830Z'
epss: 0.00189
epssPercentile: 0.07601
---

## Overview

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

octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity

rvu_register_interrupts() walks every MSI-X vector and uses strstr()
to match "Mbox" or "FLR" in irq_name before pinning those interrupts
to CPU 0. irq_name is a per-vector NAME_SIZE buffer, but not every
slot is populated before this loop runs. strstr() keeps scanning until
it finds a NUL terminator, so an uninitialized slot can trigger a KASAN
slab-out-of-bounds read at boot when debug options are enabled.

Use strnstr() with NAME_SIZE to bound the search within each vector's
name buffer.

## Remediation

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