CVE-2025-39752

ARM: rockchip: fix kernel hang during smp initialization

CVE-2025-39752 is fixed in 9 products on 1 platform, first by DEBIAN-CVE-2025-39752, released September 11, 2025. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.5

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0018

7th percentile

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

Where it's fixed

Product	Fixed in	Fix	Released
Linux
kernel-uek · ol 8	0:5.4.17-2136.348.3.el7uek	ELSA-2025-20663	Oct 11, 2025
kernel-uek-container · ol 8	0:5.4.17-2136.348.3.el7uek	ELSA-2025-20663	Oct 11, 2025
kernel-uek-container-debug · ol 8	0:5.4.17-2136.348.3.el7uek	ELSA-2025-20663	Oct 11, 2025
kernel-uek-debug · ol 8	0:5.4.17-2136.348.3.el7uek	ELSA-2025-20663	Oct 11, 2025
kernel-uek-debug-devel · ol 8	0:5.4.17-2136.348.3.el7uek	ELSA-2025-20663	Oct 11, 2025
kernel-uek-devel · ol 8	0:5.4.17-2136.348.3.el7uek	ELSA-2025-20663	Oct 11, 2025
kernel-uek-doc · ol 8	0:5.4.17-2136.348.3.el7uek	ELSA-2025-20663	Oct 11, 2025
kernel-uek-tools · ol 8	0:5.4.17-2136.348.3.el7uek	ELSA-2025-20663	Oct 11, 2025
linux · Debian 12.15 (bookworm)	6.1.153-1	DEBIAN-CVE-2025-39752	Sep 11, 2025
linux · Debian 13.5 (trixie)	6.12.43-1	DEBIAN-CVE-2025-39752	Sep 11, 2025
linux · Debian 14	6.16.3-1	DEBIAN-CVE-2025-39752	Sep 11, 2025

Details

Published
September 11, 2025
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-39752

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