Vulnerabilidad en Linux (CVE-2026-23064)

En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:<br /> <br /> net/sched: act_ife: evitar posible desreferencia de NULL<br /> <br /> tcf_ife_encode() debe asegurarse de que ife_encode() no devuelva NULL.<br /> <br /> syzbot informó:<br /> <br /> Oops: fallo de protección general, probablemente para dirección no canónica 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI<br /> KASAN: desreferencia de puntero nulo en el rango [0x0000000000000000-0x0000000000000007]<br /> RIP: 0010:ife_tlv_meta_encode+0x41/0xa0 net/ife/ife.c:166<br /> CPU: 3 UID: 0 PID: 8990 Comm: syz.0.696 No contaminado syzkaller #0 PREEMPT(full)<br /> Traza de Llamada:<br /> <br /> ife_encode_meta_u32+0x153/0x180 net/sched/act_ife.c:101<br /> tcf_ife_encode net/sched/act_ife.c:841 [inline]<br /> tcf_ife_act+0x1022/0x1de0 net/sched/act_ife.c:877<br /> tc_act include/net/tc_wrapper.h:130 [inline]<br /> tcf_action_exec+0x1c0/0xa20 net/sched/act_api.c:1152<br /> tcf_exts_exec include/net/pkt_cls.h:349 [inline]<br /> mall_classify+0x1a0/0x2a0 net/sched/cls_matchall.c:42<br /> tc_classify include/net/tc_wrapper.h:197 [inline]<br /> __tcf_classify net/sched/cls_api.c:1764 [inline]<br /> tcf_classify+0x7f2/0x1380 net/sched/cls_api.c:1860<br /> multiq_classify net/sched/sch_multiq.c:39 [inline]<br /> multiq_enqueue+0xe0/0x510 net/sched/sch_multiq.c:66<br /> dev_qdisc_enqueue+0x45/0x250 net/core/dev.c:4147<br /> __dev_xmit_skb net/core/dev.c:4262 [inline]<br /> __dev_queue_xmit+0x2998/0x46c0 net/core/dev.c:4798