CVE-2025-38704

Advisory lineage Upstream: 0 Downstream: 22
Modified
Published: 04 Sept 2025, 15:32
Last modified:11 May 2026, 21:33

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Sept 2025, 15:32
Published
Vulnerability first disclosed
11 May 2026, 21:33
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: rcu/nocb: Fix possible invalid rdp's->nocb_cb_kthread pointer access In the preparation stage of CPU online, if the corresponding the rdp's->nocb_cb_kthread does not exist, will be created, there is a situation where the rdp's rcuop kthreads creation fails, and then de-offload this CPU's rdp, does not assign this CPU's rdp->nocb_cb_kthread pointer, but this rdp's->nocb_gp_rdp and rdp's->rdp_gp->nocb_gp_kthread is still valid. This will cause the subsequent re-offload operation of this offline CPU, which will pass the conditional check and the kthread_unpark() will access invalid rdp's->nocb_cb_kthread pointer. This commit therefore use rdp's->nocb_gp_kthread instead of rdp_gp's->nocb_gp_kthread for safety check.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Affected Systems

  • linux•linux

    ≥ 3a5761dc025da47960755ac64d9fbf1c32e8cd80, < b097ae798298885695c339d390b48b4e39619fa7 | ≥ 3a5761dc025da47960755ac64d9fbf1c32e8cd80, < 3da45ec1e485a1a5ad31fe9ddd467c7ee5ae4ef9 | ≥ 3a5761dc025da47960755ac64d9fbf1c32e8cd80, < cce3d027227c69e85896af9fbc6fa9af5c68f067 | ≥ 3a5761dc025da47960755ac64d9fbf1c32e8cd80, < 1c951683a720b17c9ecaad1932bc95b29044611f | ≥ 3a5761dc025da47960755ac64d9fbf1c32e8cd80, < 9b5ec8e6b31755288a07b3abeeab8cd38e9d3c9d | ≥ 3a5761dc025da47960755ac64d9fbf1c32e8cd80, < 1bba3900ca18bdae28d1b9fa10f16a8f8cb2ada1 | 6.0

  • linux•linux_kernel

    < 6.12.43 | ≥ 6.13, < 6.15.11 | ≥ 6.16, < 6.16.2

References (6)