VulnerabilityPublished 11 Sep 2025Updated 5 Nov 2026

CVE-2025-39752: Linux kernel · ARM: rockchip: fix kernel hang during smp initialization

Affects Linux kernelSource CVE Database V5

Compare

Not known to be exploited · fixed in d7d6d076ee9532c4668f14696a35688d35dd16f4 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:47 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in d7d6d076ee9532c4668f14696a35688d35dd16f4, c0726d1e466e2d0da620836e293a59e6427ccdff, 265583266d93db4ff83d088819b1f63fdf0131db +6

Exploitation evidence

Disclosed: evidence found.
CVE published 11 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3ee851e212d0bb6be8c462059fba74ce2e3f6064, < d7d6d076ee9532c4668f14696a35688d35dd16f4	Fixed in d7d6d076ee9532c4668f14696a35688d35dd16f4
LinuxLinux	Affected ≥ 3ee851e212d0bb6be8c462059fba74ce2e3f6064, < c0726d1e466e2d0da620836e293a59e6427ccdff	Fixed in c0726d1e466e2d0da620836e293a59e6427ccdff
LinuxLinux	Affected ≥ 3ee851e212d0bb6be8c462059fba74ce2e3f6064, < 265583266d93db4ff83d088819b1f63fdf0131db	Fixed in 265583266d93db4ff83d088819b1f63fdf0131db
LinuxLinux	Affected ≥ 3ee851e212d0bb6be8c462059fba74ce2e3f6064, < 47769dab9073a73e127aa0bfd0ba4c51eaccdc33	Fixed in 47769dab9073a73e127aa0bfd0ba4c51eaccdc33
LinuxLinux	Affected ≥ 3ee851e212d0bb6be8c462059fba74ce2e3f6064, < 888a453c2a239765a7ab4de8a3cedae2e3802528	Fixed in 888a453c2a239765a7ab4de8a3cedae2e3802528
LinuxLinux	Affected ≥ 3ee851e212d0bb6be8c462059fba74ce2e3f6064, < 0223a3683d502b7e5eb2eb4ad7e97363fa88d531	Fixed in 0223a3683d502b7e5eb2eb4ad7e97363fa88d531

AI-suggested

A fix has been implemented and is available in the Linux kernel. Users should update to a Linux kernel version that includes the patch identified by the fixed commit hashes. No additional mitigation is required once patched.

Description

A kernel hang issue during SMP initialization on ARM Rockchip platforms, specifically RK3188, has been fixed in the Linux kernel. The problem occurred because the trampoline code for secondary CPUs was written to SRAM while those CPUs were powered on, causing rare hangs. The fix moves SRAM initialization to when all secondary CPUs are powered down, preventing unexpected execution of trampoline code.

Impact

The vulnerability caused rare kernel hangs during SMP initialization on affected ARM Rockchip CPUs, potentially leading to system instability or denial of service during boot. There is no indication of code execution or privilege escalation beyond the hang condition.

Summary

CVE-2025-39752 addresses a kernel hang during symmetric multiprocessing (SMP) initialization on ARM Rockchip platforms in the Linux kernel. The root cause was that the main CPU wrote trampoline code to SRAM while secondary CPUs were powered on, leading to rare hangs as secondary CPUs could execute trampoline code unexpectedly. The patch changes the SRAM initialization timing to after all secondary CPUs are powered down, resolving the issue. This fix targets the RK3188 CPU and related platforms.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Nov 2026, 21:47 UTC

Technical details

References

Community reviews

Related threats