{"id":"CVE-2026-52975","revision":"1c8e498a4b1749c99addfe22dcdc77f5","records":[{"revision":"1c8e498a4b1749c99addfe22dcdc77f5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-52975","aliases":[],"title":"bonding: 3ad: implement proper RCU rules for port->aggregator","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: 3ad: implement proper RCU rules for port->aggregator\n\nsyzbot found a data-race in bond_3ad_get_active_agg_info /\nbond_3ad_state_machine_handler [1] which hints at lack of proper\nRCU implementation.\n\nAdd __rcu qualifier to port->aggregator, and add proper RCU API.\n\n[1]\n\nBUG: KCSAN: data-race in bond_3ad_get_active_agg_info / bond_3ad_state_machine_handler\n\nwrite to 0xffff88813cf5c4b0 of 8 bytes by task 36 on cpu 0:\n  ad_port_selection_logic drivers/net/bonding/bond_3ad.c:1659 [inline]\n  bond_3ad_state_machine_handler+0x9d5/0x2d60 drivers/net/bonding/bond_3ad.c:2569\n  process_one_work kernel/workqueue.c:3302 [inline]\n  process_scheduled_works+0x4f0/0x9c0 kernel/workqueue.c:3385\n  worker_thread+0x58a/0x780 kernel/workqueue.c:3466\n  kthread+0x22a/0x280 kernel/kthread.c:436\n  ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158\n  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n\nread to 0xffff88813cf5c4b0 of 8 bytes by task 22063 on cpu 1:\n  __bond_3ad_get_active_agg_info drivers/net/bonding/bond_3ad.c:2858 [inline]\n  bond_3ad_get_active_agg_info+0x8c/0x230 drivers/net/bonding/bond_3ad.c:2881\n  bond_fill_info+0xe0f/0x10f0 drivers/net/bonding/bond_netlink.c:853\n  rtnl_link_info_fill net/core/rtnetlink.c:906 [inline]\n  rtnl_link_fill+0x1d7/0x4e0 net/core/rtnetlink.c:927\n  rtnl_fill_ifinfo+0xf8e/0x1380 net/core/rtnetlink.c:2168\n  rtmsg_ifinfo_build_skb+0x11c/0x1b0 net/core/rtnetlink.c:4453\n  rtmsg_ifinfo_event net/core/rtnetlink.c:4486 [inline]\n  rtmsg_ifinfo+0x6d/0x110 net/core/rtnetlink.c:4495\n  __dev_notify_flags+0x76/0x390 net/core/dev.c:9790\n  netif_change_flags+0xac/0xd0 net/core/dev.c:9823\n  do_setlink+0x905/0x2950 net/core/rtnetlink.c:3180\n  rtnl_group_changelink net/core/rtnetlink.c:3813 [inline]\n  __rtnl_newlink net/core/rtnetlink.c:3981 [inline]\n  rtnl_newlink+0xf55/0x1400 net/core/rtnetlink.c:4109\n  rtnetlink_rcv_msg+0x64b/0x720 net/core/rtnetlink.c:6995\n  netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2550\n  rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:7022\n  netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]\n  netlink_unicast+0x5a8/0x680 net/netlink/af_netlink.c:1344\n  netlink_sendmsg+0x5c8/0x6f0 net/netlink/af_netlink.c:1894\n  sock_sendmsg_nosec net/socket.c:787 [inline]\n  __sock_sendmsg net/socket.c:802 [inline]\n  ____sys_sendmsg+0x563/0x5b0 net/socket.c:2698\n  ___sys_sendmsg+0x195/0x1e0 net/socket.c:2752\n  __sys_sendmsg net/socket.c:2784 [inline]\n  __do_sys_sendmsg net/socket.c:2789 [inline]\n  __se_sys_sendmsg net/socket.c:2787 [inline]\n  __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2787\n  x64_sys_call+0x194c/0x3020 arch/x86/include/generated/asm/syscalls_64.h:47\n  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n  do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nvalue changed: 0x0000000000000000 -> 0xffff88813cf5c400\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 1 UID: 0 PID: 22063 Comm: syz.0.31122 Tainted: G        W           syzkaller #0 PREEMPT(full)\nTainted: [W]=WARN\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026","state":0,"publishedAt":"2026-06-24T16:28:52.514+00:00","modifiedAt":"2026-10-19T19:47:11.478+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/bonding/bond_3ad.c\",\n                        \"drivers/net/bonding/bond_main.c\",\n                        \"drivers/net/bonding/bond_netlink.c\",\n                        \"drivers/net/bonding/bond_procfs.c\",\n                        \"drivers/net/bonding/bond_sysfs_slave.c\",\n                        \"include/net/bond_3ad.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"47e91f56008b43e1365e8d1d4a6813fe8a33b6f6\",\n                            \"lessThan\": \"ba2272be04f0cb1e74e1e355ff32ef95df280731\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"47e91f56008b43e1365e8d1d4a6813fe8a33b6f6\",\n                            \"lessThan\": \"3b7265b3a82f40d2357c4004b26eb794a095b186\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"47e91f56008b43e1365e8d1d4a6813fe8a33b6f6\",\n                            \"lessThan\": \"5fb9ea4e8ebf514d92df2b6c9d0db25ba02ac735\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"47e91f56008b43e1365e8d1d4a6813fe8a33b6f6\",\n                            \"lessThan\": \"c169c5837525ad842df6a542facf52b6f866a519\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"47e91f56008b43e1365e8d1d4a6813fe8a33b6f6\",\n                            \"lessThan\": \"78f409fd34fe9de2b24ad8e9dca1b4608a48ed3d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"47e91f56008b43e1365e8d1d4a6813fe8a33b6f6\",\n                            \"lessThan\": \"c4f050ce06c56cfb5993268af4a5cb66ed1cd04e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/bonding/bond_3ad.c\",\n                        \"drivers/net/bonding/bond_main.c\",\n                        \"drivers/net/bonding/bond_netlink.c\",\n                        \"drivers/net/bonding/bond_procfs.c\",\n                        \"drivers/net/bonding/bond_sysfs_slave.c\",\n                        \"include/net/bond_3ad.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.141\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.95\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.33\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.10\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/ba2272be04f0cb1e74e1e355ff32ef95df280731","https://git.kernel.org/stable/c/3b7265b3a82f40d2357c4004b26eb794a095b186","https://git.kernel.org/stable/c/5fb9ea4e8ebf514d92df2b6c9d0db25ba02ac735","https://git.kernel.org/stable/c/c169c5837525ad842df6a542facf52b6f866a519","https://git.kernel.org/stable/c/78f409fd34fe9de2b24ad8e9dca1b4608a48ed3d","https://git.kernel.org/stable/c/c4f050ce06c56cfb5993268af4a5cb66ed1cd04e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-52975","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-52975","identifiers":["CVE-2026-52975"]},"retained":false,"historicalAffected":[]}],"coverage":[]}