---
id: CVE-2025-39752
title: 'ARM: rockchip: fix kernel hang during smp initialization'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ARM: rockchip: fix kernel hang during smp initialization

  In order to bring up secondary CPUs main CPU write trampoline
  code to SRAM. The trampoline code is written whi…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 <
    3c6bf7a324b8995b9c7d790c8d2abf0668f51551
  - >-
    Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 <
    888a453c2a239765a7ab4de8a3cedae2e3802528
  - >-
    Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 <
    c0726d1e466e2d0da620836e293a59e6427ccdff
  - >-
    Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 <
    265583266d93db4ff83d088819b1f63fdf0131db
  - >-
    Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 <
    d7d6d076ee9532c4668f14696a35688d35dd16f4
  - >-
    Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 <
    0223a3683d502b7e5eb2eb4ad7e97363fa88d531
  - >-
    Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 <
    47769dab9073a73e127aa0bfd0ba4c51eaccdc33
  - >-
    Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 <
    1eb67589a7e091b1e5108aab72fddbf4dc69af2c
  - >-
    Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 <
    7cdb433bb44cdc87dc5260cdf15bf03cc1cd1814
  - Linux 3.19
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:10:47.419763Z'
published: '2025-09-11'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:12:56.656Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-39752'
references:
  - url: 'https://git.kernel.org/stable/c/3c6bf7a324b8995b9c7d790c8d2abf0668f51551'
  - url: 'https://git.kernel.org/stable/c/888a453c2a239765a7ab4de8a3cedae2e3802528'
  - url: 'https://git.kernel.org/stable/c/c0726d1e466e2d0da620836e293a59e6427ccdff'
  - url: 'https://git.kernel.org/stable/c/265583266d93db4ff83d088819b1f63fdf0131db'
  - url: 'https://git.kernel.org/stable/c/d7d6d076ee9532c4668f14696a35688d35dd16f4'
  - url: 'https://git.kernel.org/stable/c/0223a3683d502b7e5eb2eb4ad7e97363fa88d531'
  - url: 'https://git.kernel.org/stable/c/47769dab9073a73e127aa0bfd0ba4c51eaccdc33'
  - url: 'https://git.kernel.org/stable/c/1eb67589a7e091b1e5108aab72fddbf4dc69af2c'
  - url: 'https://git.kernel.org/stable/c/7cdb433bb44cdc87dc5260cdf15bf03cc1cd1814'
tags:
  - cve.org
epss: 0.00176
epssPercentile: 0.07113
ingestedAt: '2026-11-05T22:38:32.023Z'
---

## Overview

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

ARM: rockchip: fix kernel hang during smp initialization

In order to bring up secondary CPUs main CPU write trampoline
code to SRAM. The trampoline code is written while secondary
CPUs are powered on (at least that true for RK3188 CPU).
Sometimes that leads to kernel hang. Probably because secondary
CPU execute trampoline code while kernel doesn't expect.

The patch moves SRAM initialization step to the point where all
secondary CPUs are powered down.

That fixes rarely hangs on RK3188:
[    0.091568] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.091996] rockchip_smp_prepare_cpus: ncores 4

## Affected

- `Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 < 3c6bf7a324b8995b9c7d790c8d2abf0668f51551`
- `Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 < 888a453c2a239765a7ab4de8a3cedae2e3802528`
- `Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 < c0726d1e466e2d0da620836e293a59e6427ccdff`
- `Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 < 265583266d93db4ff83d088819b1f63fdf0131db`
- `Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 < d7d6d076ee9532c4668f14696a35688d35dd16f4`
- `Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 < 0223a3683d502b7e5eb2eb4ad7e97363fa88d531`
- `Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 < 47769dab9073a73e127aa0bfd0ba4c51eaccdc33`
- `Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 < 1eb67589a7e091b1e5108aab72fddbf4dc69af2c`
- `Linux >= 3ee851e212d0bb6be8c462059fba74ce2e3f6064 < 7cdb433bb44cdc87dc5260cdf15bf03cc1cd1814`
- `Linux 3.19`

## Remediation

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