# CVE-2025-68318: clk: thead: th1520-ap: set all AXI clocks to CLK_IS_CRITICAL

CVE-2025-68318 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-68318, released December 16, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-68318
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 16, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-68318

## Description

In the Linux kernel, the following vulnerability has been resolved:  clk: thead: th1520-ap: set all AXI clocks to CLK_IS_CRITICAL  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 CLK_IS_CRITICAL. All these clock gates are ungated by default on system reset.  In addition, convert all current CLK_IGNORE_UNUSED usage to CLK_IS_CRITICAL to prevent unwanted clock gating.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.115-2 | [DEBIAN-CVE-2025-68318](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68318.md) | Dec 16, 2025 |
| Linux | linux Debian 14 | 6.17.8-1 | [DEBIAN-CVE-2025-68318](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68318.md) | Dec 16, 2025 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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