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CVE-2022-49921 – Linux Kernel Net Scheduler Use After Free Vulnerability

The following table lists the changes that have been made to the
CVE-2022-49921 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

    May. 01, 2025

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

    net: sched: Fix use after free in red_enqueue()

    We can’t use “skb” again after passing it to qdisc_enqueue(). This is
    basically identical to commit 2f09707d0c97 (“sch_sfb: Also store skb
    len before calling child enqueue”).
    Added Reference https://git.kernel.org/stable/c/170e5317042c302777ed6d59fdb84af9b0219d4e
    Added Reference https://git.kernel.org/stable/c/52e0429471976785c155bfbf51d80990c6cd46e2
    Added Reference https://git.kernel.org/stable/c/5960b9081baca85cc7dcb14aec1de85999ea9d36
    Added Reference https://git.kernel.org/stable/c/795afe0b9bb6c915f0299a8e309936519be01619
    Added Reference https://git.kernel.org/stable/c/8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9
    Added Reference https://git.kernel.org/stable/c/a238cdcf2bdc72207c74375fc8be13ee549ca9db
    Added Reference https://git.kernel.org/stable/c/e877f8fa49fbccc63cb2df2e9179bddc695b825a
    Added Reference https://git.kernel.org/stable/c/fc4b50adb400ee5ec527a04073174e8e73a139fa
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