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CVE-2025-22005 – Linux Kernel IPv6 Memory Leak Vulnerability

The following table lists the changes that have been made to the
CVE-2025-22005 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

    Apr. 03, 2025

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

    ipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw().

    fib_check_nh_v6_gw() expects that fib6_nh_init() cleans up everything
    when it fails.

    Commit 7dd73168e273 (“ipv6: Always allocate pcpu memory in a fib6_nh”)
    moved fib_nh_common_init() before alloc_percpu_gfp() within fib6_nh_init()
    but forgot to add cleanup for fib6_nh->nh_common.nhc_pcpu_rth_output in
    case it fails to allocate fib6_nh->rt6i_pcpu, resulting in memleak.

    Let’s call fib_nh_common_release() and clear nhc_pcpu_rth_output in the
    error path.

    Note that we can remove the fib6_nh_release() call in nh_create_ipv6()
    later in net-next.git.
    Added Reference https://git.kernel.org/stable/c/119dcafe36795a15ae53351cbbd6177aaf94ffef
    Added Reference https://git.kernel.org/stable/c/29d91820184d5cbc70f3246d4911d96eaeb930d6
    Added Reference https://git.kernel.org/stable/c/77c41cdbe6bce476e08d3251c0d501feaf10a9f3
    Added Reference https://git.kernel.org/stable/c/9740890ee20e01f99ff1dde84c63dcf089fabb98
    Added Reference https://git.kernel.org/stable/c/d3d5b4b5ae263c3225db363ba08b937e2e2b0380
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