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CVE-2024-26669 is a memory-leak vulnerability in the Linux kernel traffic-control flower classifier's chain-template hardware-offload lifecycle. When a qdisc is deleted, the traffic-control stack unbinds the driver's flow-block callback and replays destruction of ordinary filters, but historically did not replay destruction of chain templates. Consequently, drivers supporting flower chain-template offload do not receive the FLOW_CLS_TMPLT_DESTROY command and retain allocations associated with the template. The upstream fix adds template reoffload handling and causes flower to emit template create or destroy commands during flow-block bind and unbind processing.
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Linux kernel traffic-control flower classifier chain-template offload flaw.
Linux kernel net/sched flower classifier chain-template offload issue.
Unknown
A Linux kernel net/sched flower subsystem vulnerability involving chain-template offload handling. The referenced assessment characterizes its estimated impact as low.
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