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CVE-2025-21788 – Qualcomm am65-cpsw Linux Kernel Memory Leak Vulnerability

The following table lists the changes that have been made to the
CVE-2025-21788 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

    Feb. 27, 2025

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

    net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases

    If the XDP program doesn’t result in XDP_PASS then we leak the
    memory allocated by am65_cpsw_build_skb().

    It is pointless to allocate SKB memory before running the XDP
    program as we would be wasting CPU cycles for cases other than XDP_PASS.
    Move the SKB allocation after evaluating the XDP program result.

    This fixes the memleak. A performance boost is seen for XDP_DROP test.

    XDP_DROP test:
    Before: 460256 rx/s 0 err/s
    After: 784130 rx/s 0 err/s
    Added Reference https://git.kernel.org/stable/c/1bba1d042107167164a0ae3a843fdf650ab005d7
    Added Reference https://git.kernel.org/stable/c/5db843258de1e4e6b1ef1cbd1797923c9e3de548
    Added Reference https://git.kernel.org/stable/c/dc11f049612b9d926aca2e55f8dc9d82850d0da3
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