CVE-2025-21707 (GCVE-0-2025-21707)

Vulnerability from cvelistv5 – Published: 2025-02-27 02:07 – Updated: 2026-07-14 12:39
VLAI
Title
mptcp: consolidate suboption status
Summary
In the Linux kernel, the following vulnerability has been resolved: mptcp: consolidate suboption status MPTCP maintains the received sub-options status is the bitmask carrying the received suboptions and in several bitfields carrying per suboption additional info. Zeroing the bitmask before parsing is not enough to ensure a consistent status, and the MPTCP code has to additionally clear some bitfiled depending on the actually parsed suboption. The above schema is fragile, and syzbot managed to trigger a path where a relevant bitfield is not cleared/initialized: BUG: KMSAN: uninit-value in __mptcp_expand_seq net/mptcp/options.c:1030 [inline] BUG: KMSAN: uninit-value in mptcp_expand_seq net/mptcp/protocol.h:864 [inline] BUG: KMSAN: uninit-value in ack_update_msk net/mptcp/options.c:1060 [inline] BUG: KMSAN: uninit-value in mptcp_incoming_options+0x2036/0x3d30 net/mptcp/options.c:1209 __mptcp_expand_seq net/mptcp/options.c:1030 [inline] mptcp_expand_seq net/mptcp/protocol.h:864 [inline] ack_update_msk net/mptcp/options.c:1060 [inline] mptcp_incoming_options+0x2036/0x3d30 net/mptcp/options.c:1209 tcp_data_queue+0xb4/0x7be0 net/ipv4/tcp_input.c:5233 tcp_rcv_established+0x1061/0x2510 net/ipv4/tcp_input.c:6264 tcp_v4_do_rcv+0x7f3/0x11a0 net/ipv4/tcp_ipv4.c:1916 tcp_v4_rcv+0x51df/0x5750 net/ipv4/tcp_ipv4.c:2351 ip_protocol_deliver_rcu+0x2a3/0x13d0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x336/0x500 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:460 [inline] ip_rcv_finish+0x4a2/0x520 net/ipv4/ip_input.c:447 NF_HOOK include/linux/netfilter.h:314 [inline] ip_rcv+0xcd/0x380 net/ipv4/ip_input.c:567 __netif_receive_skb_one_core net/core/dev.c:5704 [inline] __netif_receive_skb+0x319/0xa00 net/core/dev.c:5817 process_backlog+0x4ad/0xa50 net/core/dev.c:6149 __napi_poll+0xe7/0x980 net/core/dev.c:6902 napi_poll net/core/dev.c:6971 [inline] net_rx_action+0xa5a/0x19b0 net/core/dev.c:7093 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561 __do_softirq+0x14/0x1a kernel/softirq.c:595 do_softirq+0x9a/0x100 kernel/softirq.c:462 __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:389 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline] __dev_queue_xmit+0x2758/0x57d0 net/core/dev.c:4493 dev_queue_xmit include/linux/netdevice.h:3168 [inline] neigh_hh_output include/net/neighbour.h:523 [inline] neigh_output include/net/neighbour.h:537 [inline] ip_finish_output2+0x187c/0x1b70 net/ipv4/ip_output.c:236 __ip_finish_output+0x287/0x810 ip_finish_output+0x4b/0x600 net/ipv4/ip_output.c:324 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip_output+0x15f/0x3f0 net/ipv4/ip_output.c:434 dst_output include/net/dst.h:450 [inline] ip_local_out net/ipv4/ip_output.c:130 [inline] __ip_queue_xmit+0x1f2a/0x20d0 net/ipv4/ip_output.c:536 ip_queue_xmit+0x60/0x80 net/ipv4/ip_output.c:550 __tcp_transmit_skb+0x3cea/0x4900 net/ipv4/tcp_output.c:1468 tcp_transmit_skb net/ipv4/tcp_output.c:1486 [inline] tcp_write_xmit+0x3b90/0x9070 net/ipv4/tcp_output.c:2829 __tcp_push_pending_frames+0xc4/0x380 net/ipv4/tcp_output.c:3012 tcp_send_fin+0x9f6/0xf50 net/ipv4/tcp_output.c:3618 __tcp_close+0x140c/0x1550 net/ipv4/tcp.c:3130 __mptcp_close_ssk+0x74e/0x16f0 net/mptcp/protocol.c:2496 mptcp_close_ssk+0x26b/0x2c0 net/mptcp/protocol.c:2550 mptcp_pm_nl_rm_addr_or_subflow+0x635/0xd10 net/mptcp/pm_netlink.c:889 mptcp_pm_nl_rm_subflow_received net/mptcp/pm_netlink.c:924 [inline] mptcp_pm_flush_addrs_and_subflows net/mptcp/pm_netlink.c:1688 [inline] mptcp_nl_flush_addrs_list net/mptcp/pm_netlink.c:1709 [inline] mptcp_pm_nl_flush_addrs_doit+0xe10/0x1630 net/mptcp/pm_netlink.c:1750 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc , < 3a7fda57b0f91f7ea34476b165f91a92feb17c96 (git)
Affected: 84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc , < 3b5332d416d151a15742d1b16e7319368e3cc5c6 (git)
Affected: 84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc , < 7f6c72b8ef8130760710e337dc8fbe7263954884 (git)
Affected: 84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc , < 6169e942370b4b6f9442d35c51519bf6c346843b (git)
Affected: 84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc , < ba0518f9e8688cd4fcb569e8df2a74874b4f3894 (git)
Affected: 84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc , < c86b000782daba926c627d2fa00c3f60a75e7472 (git)
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Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.15.179 , ≤ 5.15.* (semver)
Unaffected: 6.1.129 , ≤ 6.1.* (semver)
Unaffected: 6.6.76 , ≤ 6.6.* (semver)
Unaffected: 6.12.13 , ≤ 6.12.* (semver)
Unaffected: 6.13.2 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
Create a notification for this product.
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: consolidate suboption status\n\nMPTCP maintains the received sub-options status is the bitmask carrying\nthe received suboptions and in several bitfields carrying per suboption\nadditional info.\n\nZeroing the bitmask before parsing is not enough to ensure a consistent\nstatus, and the MPTCP code has to additionally clear some bitfiled\ndepending on the actually parsed suboption.\n\nThe above schema is fragile, and syzbot managed to trigger a path where\na relevant bitfield is not cleared/initialized:\n\n  BUG: KMSAN: uninit-value in __mptcp_expand_seq net/mptcp/options.c:1030 [inline]\n  BUG: KMSAN: uninit-value in mptcp_expand_seq net/mptcp/protocol.h:864 [inline]\n  BUG: KMSAN: uninit-value in ack_update_msk net/mptcp/options.c:1060 [inline]\n  BUG: KMSAN: uninit-value in mptcp_incoming_options+0x2036/0x3d30 net/mptcp/options.c:1209\n   __mptcp_expand_seq net/mptcp/options.c:1030 [inline]\n   mptcp_expand_seq net/mptcp/protocol.h:864 [inline]\n   ack_update_msk net/mptcp/options.c:1060 [inline]\n   mptcp_incoming_options+0x2036/0x3d30 net/mptcp/options.c:1209\n   tcp_data_queue+0xb4/0x7be0 net/ipv4/tcp_input.c:5233\n   tcp_rcv_established+0x1061/0x2510 net/ipv4/tcp_input.c:6264\n   tcp_v4_do_rcv+0x7f3/0x11a0 net/ipv4/tcp_ipv4.c:1916\n   tcp_v4_rcv+0x51df/0x5750 net/ipv4/tcp_ipv4.c:2351\n   ip_protocol_deliver_rcu+0x2a3/0x13d0 net/ipv4/ip_input.c:205\n   ip_local_deliver_finish+0x336/0x500 net/ipv4/ip_input.c:233\n   NF_HOOK include/linux/netfilter.h:314 [inline]\n   ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254\n   dst_input include/net/dst.h:460 [inline]\n   ip_rcv_finish+0x4a2/0x520 net/ipv4/ip_input.c:447\n   NF_HOOK include/linux/netfilter.h:314 [inline]\n   ip_rcv+0xcd/0x380 net/ipv4/ip_input.c:567\n   __netif_receive_skb_one_core net/core/dev.c:5704 [inline]\n   __netif_receive_skb+0x319/0xa00 net/core/dev.c:5817\n   process_backlog+0x4ad/0xa50 net/core/dev.c:6149\n   __napi_poll+0xe7/0x980 net/core/dev.c:6902\n   napi_poll net/core/dev.c:6971 [inline]\n   net_rx_action+0xa5a/0x19b0 net/core/dev.c:7093\n   handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561\n   __do_softirq+0x14/0x1a kernel/softirq.c:595\n   do_softirq+0x9a/0x100 kernel/softirq.c:462\n   __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:389\n   local_bh_enable include/linux/bottom_half.h:33 [inline]\n   rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]\n   __dev_queue_xmit+0x2758/0x57d0 net/core/dev.c:4493\n   dev_queue_xmit include/linux/netdevice.h:3168 [inline]\n   neigh_hh_output include/net/neighbour.h:523 [inline]\n   neigh_output include/net/neighbour.h:537 [inline]\n   ip_finish_output2+0x187c/0x1b70 net/ipv4/ip_output.c:236\n   __ip_finish_output+0x287/0x810\n   ip_finish_output+0x4b/0x600 net/ipv4/ip_output.c:324\n   NF_HOOK_COND include/linux/netfilter.h:303 [inline]\n   ip_output+0x15f/0x3f0 net/ipv4/ip_output.c:434\n   dst_output include/net/dst.h:450 [inline]\n   ip_local_out net/ipv4/ip_output.c:130 [inline]\n   __ip_queue_xmit+0x1f2a/0x20d0 net/ipv4/ip_output.c:536\n   ip_queue_xmit+0x60/0x80 net/ipv4/ip_output.c:550\n   __tcp_transmit_skb+0x3cea/0x4900 net/ipv4/tcp_output.c:1468\n   tcp_transmit_skb net/ipv4/tcp_output.c:1486 [inline]\n   tcp_write_xmit+0x3b90/0x9070 net/ipv4/tcp_output.c:2829\n   __tcp_push_pending_frames+0xc4/0x380 net/ipv4/tcp_output.c:3012\n   tcp_send_fin+0x9f6/0xf50 net/ipv4/tcp_output.c:3618\n   __tcp_close+0x140c/0x1550 net/ipv4/tcp.c:3130\n   __mptcp_close_ssk+0x74e/0x16f0 net/mptcp/protocol.c:2496\n   mptcp_close_ssk+0x26b/0x2c0 net/mptcp/protocol.c:2550\n   mptcp_pm_nl_rm_addr_or_subflow+0x635/0xd10 net/mptcp/pm_netlink.c:889\n   mptcp_pm_nl_rm_subflow_received net/mptcp/pm_netlink.c:924 [inline]\n   mptcp_pm_flush_addrs_and_subflows net/mptcp/pm_netlink.c:1688 [inline]\n   mptcp_nl_flush_addrs_list net/mptcp/pm_netlink.c:1709 [inline]\n   mptcp_pm_nl_flush_addrs_doit+0xe10/0x1630 net/mptcp/pm_netlink.c:1750\n   genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]\n \n---truncated---"
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      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21707\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-27T02:15:14.347\",\"lastModified\":\"2026-07-14T13:17:21.383\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmptcp: consolidate suboption status\\n\\nMPTCP maintains the received sub-options status is the bitmask carrying\\nthe received suboptions and in several bitfields carrying per suboption\\nadditional info.\\n\\nZeroing the bitmask before parsing is not enough to ensure a consistent\\nstatus, and the MPTCP code has to additionally clear some bitfiled\\ndepending on the actually parsed suboption.\\n\\nThe above schema is fragile, and syzbot managed to trigger a path where\\na relevant bitfield is not cleared/initialized:\\n\\n  BUG: KMSAN: uninit-value in __mptcp_expand_seq net/mptcp/options.c:1030 [inline]\\n  BUG: KMSAN: uninit-value in mptcp_expand_seq net/mptcp/protocol.h:864 [inline]\\n  BUG: KMSAN: uninit-value in ack_update_msk net/mptcp/options.c:1060 [inline]\\n  BUG: KMSAN: uninit-value in mptcp_incoming_options+0x2036/0x3d30 net/mptcp/options.c:1209\\n   __mptcp_expand_seq net/mptcp/options.c:1030 [inline]\\n   mptcp_expand_seq net/mptcp/protocol.h:864 [inline]\\n   ack_update_msk net/mptcp/options.c:1060 [inline]\\n   mptcp_incoming_options+0x2036/0x3d30 net/mptcp/options.c:1209\\n   tcp_data_queue+0xb4/0x7be0 net/ipv4/tcp_input.c:5233\\n   tcp_rcv_established+0x1061/0x2510 net/ipv4/tcp_input.c:6264\\n   tcp_v4_do_rcv+0x7f3/0x11a0 net/ipv4/tcp_ipv4.c:1916\\n   tcp_v4_rcv+0x51df/0x5750 net/ipv4/tcp_ipv4.c:2351\\n   ip_protocol_deliver_rcu+0x2a3/0x13d0 net/ipv4/ip_input.c:205\\n   ip_local_deliver_finish+0x336/0x500 net/ipv4/ip_input.c:233\\n   NF_HOOK include/linux/netfilter.h:314 [inline]\\n   ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254\\n   dst_input include/net/dst.h:460 [inline]\\n   ip_rcv_finish+0x4a2/0x520 net/ipv4/ip_input.c:447\\n   NF_HOOK include/linux/netfilter.h:314 [inline]\\n   ip_rcv+0xcd/0x380 net/ipv4/ip_input.c:567\\n   __netif_receive_skb_one_core net/core/dev.c:5704 [inline]\\n   __netif_receive_skb+0x319/0xa00 net/core/dev.c:5817\\n   process_backlog+0x4ad/0xa50 net/core/dev.c:6149\\n   __napi_poll+0xe7/0x980 net/core/dev.c:6902\\n   napi_poll net/core/dev.c:6971 [inline]\\n   net_rx_action+0xa5a/0x19b0 net/core/dev.c:7093\\n   handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561\\n   __do_softirq+0x14/0x1a kernel/softirq.c:595\\n   do_softirq+0x9a/0x100 kernel/softirq.c:462\\n   __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:389\\n   local_bh_enable include/linux/bottom_half.h:33 [inline]\\n   rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]\\n   __dev_queue_xmit+0x2758/0x57d0 net/core/dev.c:4493\\n   dev_queue_xmit include/linux/netdevice.h:3168 [inline]\\n   neigh_hh_output include/net/neighbour.h:523 [inline]\\n   neigh_output include/net/neighbour.h:537 [inline]\\n   ip_finish_output2+0x187c/0x1b70 net/ipv4/ip_output.c:236\\n   __ip_finish_output+0x287/0x810\\n   ip_finish_output+0x4b/0x600 net/ipv4/ip_output.c:324\\n   NF_HOOK_COND include/linux/netfilter.h:303 [inline]\\n   ip_output+0x15f/0x3f0 net/ipv4/ip_output.c:434\\n   dst_output include/net/dst.h:450 [inline]\\n   ip_local_out net/ipv4/ip_output.c:130 [inline]\\n   __ip_queue_xmit+0x1f2a/0x20d0 net/ipv4/ip_output.c:536\\n   ip_queue_xmit+0x60/0x80 net/ipv4/ip_output.c:550\\n   __tcp_transmit_skb+0x3cea/0x4900 net/ipv4/tcp_output.c:1468\\n   tcp_transmit_skb net/ipv4/tcp_output.c:1486 [inline]\\n   tcp_write_xmit+0x3b90/0x9070 net/ipv4/tcp_output.c:2829\\n   __tcp_push_pending_frames+0xc4/0x380 net/ipv4/tcp_output.c:3012\\n   tcp_send_fin+0x9f6/0xf50 net/ipv4/tcp_output.c:3618\\n   __tcp_close+0x140c/0x1550 net/ipv4/tcp.c:3130\\n   __mptcp_close_ssk+0x74e/0x16f0 net/mptcp/protocol.c:2496\\n   mptcp_close_ssk+0x26b/0x2c0 net/mptcp/protocol.c:2550\\n   mptcp_pm_nl_rm_addr_or_subflow+0x635/0xd10 net/mptcp/pm_netlink.c:889\\n   mptcp_pm_nl_rm_subflow_received net/mptcp/pm_netlink.c:924 [inline]\\n   mptcp_pm_flush_addrs_and_subflows net/mptcp/pm_netlink.c:1688 [inline]\\n   mptcp_nl_flush_addrs_list net/mptcp/pm_netlink.c:1709 [inline]\\n   mptcp_pm_nl_flush_addrs_doit+0xe10/0x1630 net/mptcp/pm_netlink.c:1750\\n   genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]\\n \\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mptcp: consolidar el estado de las subopciones MPTCP mantiene el estado de las subopciones recibidas en la m\u00e1scara de bits que contiene las subopciones recibidas y en varios campos de bits que contienen informaci\u00f3n adicional por subopci\u00f3n. Poner a cero la m\u00e1scara de bits antes del an\u00e1lisis no es suficiente para garantizar un estado consistente, y el c\u00f3digo MPTCP tiene que borrar adicionalmente algunos campos de bits seg\u00fan la subopci\u00f3n analizada en realidad. El esquema anterior es fr\u00e1gil y syzbot logr\u00f3 activar una ruta donde un campo de bits relevante no se borra/inicializa: ERROR: KMSAN: uninit-value in __mptcp_expand_seq net/mptcp/options.c:1030 [inline] BUG: KMSAN: uninit-value in mptcp_expand_seq net/mptcp/protocol.h:864 [inline] BUG: KMSAN: uninit-value in ack_update_msk net/mptcp/options.c:1060 [inline] BUG: KMSAN: uninit-value in mptcp_incoming_options+0x2036/0x3d30 net/mptcp/options.c:1209 __mptcp_expand_seq net/mptcp/options.c:1030 [inline] mptcp_expand_seq net/mptcp/protocol.h:864 [inline] ack_update_msk net/mptcp/options.c:1060 [inline] mptcp_incoming_options+0x2036/0x3d30 net/mptcp/options.c:1209 tcp_data_queue+0xb4/0x7be0 net/ipv4/tcp_input.c:5233 tcp_rcv_established+0x1061/0x2510 net/ipv4/tcp_input.c:6264 tcp_v4_do_rcv+0x7f3/0x11a0 net/ipv4/tcp_ipv4.c:1916 tcp_v4_rcv+0x51df/0x5750 net/ipv4/tcp_ipv4.c:2351 ip_protocol_deliver_rcu+0x2a3/0x13d0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x336/0x500 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:460 [inline] ip_rcv_finish+0x4a2/0x520 net/ipv4/ip_input.c:447 NF_HOOK include/linux/netfilter.h:314 [inline] ip_rcv+0xcd/0x380 net/ipv4/ip_input.c:567 __netif_receive_skb_one_core net/core/dev.c:5704 [inline] __netif_receive_skb+0x319/0xa00 net/core/dev.c:5817 process_backlog+0x4ad/0xa50 net/core/dev.c:6149 __napi_poll+0xe7/0x980 net/core/dev.c:6902 napi_poll net/core/dev.c:6971 [inline] net_rx_action+0xa5a/0x19b0 net/core/dev.c:7093 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561 __do_softirq+0x14/0x1a kernel/softirq.c:595 do_softirq+0x9a/0x100 kernel/softirq.c:462 __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:389 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline] __dev_queue_xmit+0x2758/0x57d0 net/core/dev.c:4493 dev_queue_xmit include/linux/netdevice.h:3168 [inline] neigh_hh_output include/net/neighbour.h:523 [inline] neigh_output include/net/neighbour.h:537 [inline] ip_finish_output2+0x187c/0x1b70 net/ipv4/ip_output.c:236 __ip_finish_output+0x287/0x810 ip_finish_output+0x4b/0x600 net/ipv4/ip_output.c:324 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip_output+0x15f/0x3f0 net/ipv4/ip_output.c:434 dst_output include/net/dst.h:450 [inline] ip_local_out net/ipv4/ip_output.c:130 [inline] __ip_queue_xmit+0x1f2a/0x20d0 net/ipv4/ip_output.c:536 ip_queue_xmit+0x60/0x80 net/ipv4/ip_output.c:550 __tcp_transmit_skb+0x3cea/0x4900 net/ipv4/tcp_output.c:1468 tcp_transmit_skb net/ipv4/tcp_output.c:1486 [inline] tcp_write_xmit+0x3b90/0x9070 net/ipv4/tcp_output.c:2829 __tcp_push_pending_frames+0xc4/0x380 net/ipv4/tcp_output.c:3012 tcp_send_fin+0x9f6/0xf50 net/ipv4/tcp_output.c:3618 __tcp_close+0x140c/0x1550 net/ipv4/tcp.c:3130 __mptcp_close_ssk+0x74e/0x16f0 net/mptcp/protocol.c:2496 mptcp_close_ssk+0x26b/0x2c0 net/mptcp/protocol.c:2550 mptcp_pm_nl_rm_addr_or_subflow+0x635/0xd10 net/mptcp/pm_netlink.c:889 mptcp_pm_nl_rm_subflow_received net/mptcp/pm_netlink.c:924 [inline] mptcp_pm_flush_addrs_and_subflows net/mptcp/pm_netlink.c:1688 [inline] mptcp_nl_flush_addrs_list net/mptcp/pm_netlink.c:1709 [inline] mptcp_pm_nl_flush_addrs_doit+0xe10/0x1630 net/mptcp/pm_netlink.c:1750 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] ---truncated--- \"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/mptcp/options.c\",\"net/mptcp/protocol.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc\",\"lessThan\":\"3a7fda57b0f91f7ea34476b165f91a92feb17c96\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc\",\"lessThan\":\"3b5332d416d151a15742d1b16e7319368e3cc5c6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc\",\"lessThan\":\"7f6c72b8ef8130760710e337dc8fbe7263954884\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc\",\"lessThan\":\"6169e942370b4b6f9442d35c51519bf6c346843b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc\",\"lessThan\":\"ba0518f9e8688cd4fcb569e8df2a74874b4f3894\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"84dfe3677a6f45b3d0dfdd564e55717a1a5e60cc\",\"lessThan\":\"c86b000782daba926c627d2fa00c3f60a75e7472\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/mptcp/options.c\",\"net/mptcp/protocol.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.11\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.179\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.129\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.76\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.13\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.13.2\",\"lessThanOrEqual\":\"6.13.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"6.1.129\",\"matchCriteriaId\":\"E7C7BC17-DCB7-4AF7-B2AC-D9F9FF68A027\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.76\",\"matchCriteriaId\":\"A6D70701-9CB6-4222-A957-00A419878993\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.13\",\"matchCriteriaId\":\"2897389C-A8C3-4D69-90F2-E701B3D66373\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.2\",\"matchCriteriaId\":\"6D4116B1-1BFD-4F23-BA84-169CC05FC5A3\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3a7fda57b0f91f7ea34476b165f91a92feb17c96\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3b5332d416d151a15742d1b16e7319368e3cc5c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6169e942370b4b6f9442d35c51519bf6c346843b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7f6c72b8ef8130760710e337dc8fbe7263954884\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ba0518f9e8688cd4fcb569e8df2a74874b4f3894\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c86b000782daba926c627d2fa00c3f60a75e7472\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-019113.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T23:55:42+00:00",
      "cve": "CVE-2025-21707",
      "id": "CVE-2025-21707",
      "initial_release_date": "2025-02-27T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mptcp: consolidate suboption status",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21707.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.