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CVE-2025-38610 – Linux Powercap DTPM CPU NULL Pointer Dereference

The following table lists the changes that have been made to the
CVE-2025-38610 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 19, 2025

    Action Type Old Value New Value
    Added 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 ]
    Added Reference https://git.kernel.org/stable/c/27914f2b795e2b58e9506f281dcdd98fef09d3c2
    Added Reference https://git.kernel.org/stable/c/27e0318f0ea69fcfa32228847debc384ade14578
    Added Reference https://git.kernel.org/stable/c/2fd001a0075ac01dc64a28a8e21226b3d989a91d
    Added Reference https://git.kernel.org/stable/c/46dc57406887dd02565cb264224194a6776d882b
    Added Reference https://git.kernel.org/stable/c/8374ac7d69a57d737e701a851ffe980a0d27d3ad
    Added Reference https://git.kernel.org/stable/c/c6ec27091cf5ac05094c1fe3a6ce914cf711a37c
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