Double-free in Linux kernel net/sched teql_master_xmit
CVE-2026-23449 is a Linux kernel vulnerability in the traffic equalizer scheduler (TEQL) code under net/sched. The flaw is described as a double-free in the TEQL transmit path, triggered when a TEQL device uses a lockless Qdisc as its root qdisc. In that configuration, qdisc_reset was not performed under seq_lock, allowing a race with the datapath. That race can result in the same skb data being freed twice, as reflected by KASAN reports showing a double-free in skb_release_data(), with execution involving qdisc_reset(), teql_destroy(), and qdisc_graft(). The upstream fix is to call qdisc_reset while holding seq_lock so teardown/reset cannot race with concurrent packet processing.
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Cross-references every affected SKU, including bundled OEM variants.
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