CVE-2025-68318: clk: thead: th1520-ap: set all AXI clocks to CLK_IS_CRITICAL
In the Linux kernel, the following vulnerability has been resolved:
clk: thead: th1520-ap: set all AXI clocks to CLKISCRITICAL
The AXI crossbar of TH1520 has no proper timeout handling, which means gating AXI clocks can easily lead to bus timeout and thus system hang.
Set all AXI clock gates to CLKISCRITICAL. All these clock gates are ungated by default on system reset.
In addition, convert all current CLKIGNOREUNUSED usage to CLKISCRITICAL to prevent unwanted clock gating.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Set all TH1520 AXI clock gates to CLK_IS_CRITICAL, converting current CLK_IGNORE_UNUSED usage so the AXI clocks remain ungated by default on system reset.
Linux kernel TH1520 AXI clock gates clock gate flags = CLK_IS_CRITICAL
Event History
Frequently Asked Questions
What is the severity of CVE-2025-68318?
CVE-2025-68318 has a high severity due to the potential for system hang caused by improper timeout handling in the AXI crossbar.
How do I fix CVE-2025-68318?
To fix CVE-2025-68318, update your Linux kernel to a patched version that addresses the AXI-clock gating issue.
What systems are affected by CVE-2025-68318?
CVE-2025-68318 affects systems running the Linux kernel with the TH1520 AXI crossbar implementation.
What are the risks associated with CVE-2025-68318?
The risks associated with CVE-2025-68318 include potential system hangs and performance degradation when controlling AXI clocks.
Is CVE-2025-68318 actively being exploited?
As of now, there is no public information indicating that CVE-2025-68318 is being actively exploited in the wild.