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sch_qfq: do not free existing class in qfq_change_cla","CVE":"CVE-2026-22999","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"22999","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_qfq: do not free existing class in qfq_change_class()\n\nFixes qfq_change_class() error case.\n\ncl->qdisc and cl should only be freed if a new class and qdisc\nwere allocated, or we risk various UAF.","Type":"Description","Title":"net/sched: sch_qfq: do not free existing class in qfq_change_cla"}]}}}