{"id":"CVE-2025-71091","title":"team: fix check for port enabled in team_queue_override_port_prio_changed()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nteam: fix check for port enabled in team_queue_override_port_prio_changed()\n\nThere has been a syzkaller bug reported recently with the following\ntrace:\n\nlist_del corrup…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < 25029e813c4aae5fcf7118e8dd5c56e382b9a1a3","Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < f820e438b8ec2a8354e70e75145f05fe45500d97","Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < 53a727a8bfd78c739e130a781192d0f6f8e03d39","Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < 6bfb62b6010a16112dcae52f490e5e0e6abe12a3","Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < 107d245f84cb4f55f597d31eda34b42a2b7d6952","Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < b71187648ef2349254673d0523fdf96d1fe3d758","Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < 932ac51d9953eaf77a1252f79b656d4ca86163c6","Linux 3.11"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-06-10T20:40:55.382453Z"},"published":"2026-01-13","updated":"2026-10-19","sourceUpdated":"2026-10-19T18:15:12.168Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-71091","references":[{"url":"https://git.kernel.org/stable/c/25029e813c4aae5fcf7118e8dd5c56e382b9a1a3"},{"url":"https://git.kernel.org/stable/c/f820e438b8ec2a8354e70e75145f05fe45500d97"},{"url":"https://git.kernel.org/stable/c/53a727a8bfd78c739e130a781192d0f6f8e03d39"},{"url":"https://git.kernel.org/stable/c/6bfb62b6010a16112dcae52f490e5e0e6abe12a3"},{"url":"https://git.kernel.org/stable/c/107d245f84cb4f55f597d31eda34b42a2b7d6952"},{"url":"https://git.kernel.org/stable/c/b71187648ef2349254673d0523fdf96d1fe3d758"},{"url":"https://git.kernel.org/stable/c/932ac51d9953eaf77a1252f79b656d4ca86163c6"}],"tags":["cve.org"],"epss":0.00144,"epssPercentile":0.03311,"ingestedAt":"2026-10-19T18:35:50.137Z","slug":"CVE-2025-71091","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nteam: fix check for port enabled in team_queue_override_port_prio_changed()\n\nThere has been a syzkaller bug reported recently with the following\ntrace:\n\nlist_del corruption, ffff888058bea080->prev is LIST_POISON2 (dead000000000122)\n------------[ cut here ]------------\nkernel BUG at lib/list_debug.c:59!\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\nCPU: 3 UID: 0 PID: 21246 Comm: syz.0.2928 Not tainted syzkaller #0 PREEMPT(full)\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\nRIP: 0010:__list_del_entry_valid_or_report+0x13e/0x200 lib/list_debug.c:59\nCode: 48 c7 c7 e0 71 f0 8b e8 30 08 ef fc 90 0f 0b 48 89 ef e8 a5 02 55 fd 48 89 ea 48 89 de 48 c7 c7 40 72 f0 8b e8 13 08 ef fc 90 <0f> 0b 48 89 ef e8 88 02 55 fd 48 89 ea 48 b8 00 00 00 00 00 fc ff\nRSP: 0018:ffffc9000d49f370 EFLAGS: 00010286\nRAX: 000000000000004e RBX: ffff888058bea080 RCX: ffffc9002817d000\nRDX: 0000000000000000 RSI: ffffffff819becc6 RDI: 0000000000000005\nRBP: dead000000000122 R08: 0000000000000005 R09: 0000000000000000\nR10: 0000000080000000 R11: 0000000000000001 R12: ffff888039e9c230\nR13: ffff888058bea088 R14: ffff888058bea080 R15: ffff888055461480\nFS:  00007fbbcfe6f6c0(0000) GS:ffff8880d6d0a000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000110c3afcb0 CR3: 00000000382c7000 CR4: 0000000000352ef0\nCall Trace:\n <TASK>\n __list_del_entry_valid include/linux/list.h:132 [inline]\n __list_del_entry include/linux/list.h:223 [inline]\n list_del_rcu include/linux/rculist.h:178 [inline]\n __team_queue_override_port_del drivers/net/team/team_core.c:826 [inline]\n __team_queue_override_port_del drivers/net/team/team_core.c:821 [inline]\n team_queue_override_port_prio_changed drivers/net/team/team_core.c:883 [inline]\n team_priority_option_set+0x171/0x2f0 drivers/net/team/team_core.c:1534\n team_option_set drivers/net/team/team_core.c:376 [inline]\n team_nl_options_set_doit+0x8ae/0xe60 drivers/net/team/team_core.c:2653\n genl_family_rcv_msg_doit+0x209/0x2f0 net/netlink/genetlink.c:1115\n genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\n genl_rcv_msg+0x55c/0x800 net/netlink/genetlink.c:1210\n netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552\n genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219\n netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]\n netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346\n netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1896\n sock_sendmsg_nosec net/socket.c:727 [inline]\n __sock_sendmsg net/socket.c:742 [inline]\n ____sys_sendmsg+0xa98/0xc70 net/socket.c:2630\n ___sys_sendmsg+0x134/0x1d0 net/socket.c:2684\n __sys_sendmsg+0x16d/0x220 net/socket.c:2716\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe problem is in this flow:\n1) Port is enabled, queue_id != 0, in qom_list\n2) Port gets disabled\n        -> team_port_disable()\n        -> team_queue_override_port_del()\n        -> del (removed from list)\n3) Port is disabled, queue_id != 0, not in any list\n4) Priority changes\n        -> team_queue_override_port_prio_changed()\n        -> checks: port disabled && queue_id != 0\n        -> calls del - hits the BUG as it is removed already\n\nTo fix this, change the check in team_queue_override_port_prio_changed()\nso it returns early if port is not enabled.\n\n## Affected\n\n- `Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < 25029e813c4aae5fcf7118e8dd5c56e382b9a1a3`\n- `Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < f820e438b8ec2a8354e70e75145f05fe45500d97`\n- `Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < 53a727a8bfd78c739e130a781192d0f6f8e03d39`\n- `Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < 6bfb62b6010a16112dcae52f490e5e0e6abe12a3`\n- `Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < 107d245f84cb4f55f597d31eda34b42a2b7d6952`\n- `Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < b71187648ef2349254673d0523fdf96d1fe3d758`\n- `Linux >= 6c31ff366c1116823e77019bae3e92e9d77a49f4 < 932ac51d9953eaf77a1252f79b656d4ca86163c6`\n- `Linux 3.11`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}