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CVE-2025-38258 – Linux Kernel Memcg Path Memory Leak

The following table lists the changes that have been made to the
CVE-2025-38258 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

    Jul. 09, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved:

    mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write

    memcg_path_store() assigns a newly allocated memory buffer to
    filter->memcg_path, without deallocating the previously allocated and
    assigned memory buffer. As a result, users can leak kernel memory by
    continuously writing a data to memcg_path DAMOS sysfs file. Fix the leak
    by deallocating the previously set memory buffer.
    Added Reference https://git.kernel.org/stable/c/490a43d07f1663d827e802720d30cbc0494e4f81
    Added Reference https://git.kernel.org/stable/c/4a158ac0538dd5695eeaa00aa0720d711f3e4ef1
    Added Reference https://git.kernel.org/stable/c/4f489fe6afb395dbc79840efa3c05440b760d883
    Added Reference https://git.kernel.org/stable/c/c5d5b0047b0c0f304608f3824139f7bd34c48413
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