{"id":"CVE-2022-48865","summary":"tipc: fix kernel panic when enabling bearer","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix kernel panic when enabling bearer\n\nWhen enabling a bearer on a node, a kernel panic is observed:\n\n[    4.498085] RIP: 0010:tipc_mon_prep+0x4e/0x130 [tipc]\n...\n[    4.520030] Call Trace:\n[    4.520689]  \u003cIRQ\u003e\n[    4.521236]  tipc_link_build_proto_msg+0x375/0x750 [tipc]\n[    4.522654]  tipc_link_build_state_msg+0x48/0xc0 [tipc]\n[    4.524034]  __tipc_node_link_up+0xd7/0x290 [tipc]\n[    4.525292]  tipc_rcv+0x5da/0x730 [tipc]\n[    4.526346]  ? __netif_receive_skb_core+0xb7/0xfc0\n[    4.527601]  tipc_l2_rcv_msg+0x5e/0x90 [tipc]\n[    4.528737]  __netif_receive_skb_list_core+0x20b/0x260\n[    4.530068]  netif_receive_skb_list_internal+0x1bf/0x2e0\n[    4.531450]  ? dev_gro_receive+0x4c2/0x680\n[    4.532512]  napi_complete_done+0x6f/0x180\n[    4.533570]  virtnet_poll+0x29c/0x42e [virtio_net]\n...\n\nThe node in question is receiving activate messages in another\nthread after changing bearer status to allow message sending/\nreceiving in current thread:\n\n         thread 1           |              thread 2\n         --------           |              --------\n                            |\ntipc_enable_bearer()        |\n  test_and_set_bit_lock()   |\n    tipc_bearer_xmit_skb()  |\n                            | tipc_l2_rcv_msg()\n                            |   tipc_rcv()\n                            |     __tipc_node_link_up()\n                            |       tipc_link_build_state_msg()\n                            |         tipc_link_build_proto_msg()\n                            |           tipc_mon_prep()\n                            |           {\n                            |             ...\n                            |             // null-pointer dereference\n                            |             u16 gen = mon-\u003edom_gen;\n                            |             ...\n                            |           }\n  // Not being executed yet |\n  tipc_mon_create()         |\n  {                         |\n    ...                     |\n    // allocate             |\n    mon = kzalloc();        |\n    ...                     |\n  }                         |\n\nMonitoring pointer in thread 2 is dereferenced before monitoring data\nis allocated in thread 1. This causes kernel panic.\n\nThis commit fixes it by allocating the monitoring data before enabling\nthe bearer to receive messages.","modified":"2026-05-15T11:53:36.951717860Z","published":"2024-07-16T12:25:27.843Z","related":["SUSE-SU-2024:3189-1","SUSE-SU-2024:3190-1","SUSE-SU-2024:3209-1","SUSE-SU-2024:3251-1","SUSE-SU-2024:3252-1","SUSE-SU-2024:3483-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48865.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2de76d37d4a6dca9b96ea51da24d4290e6cfa1a5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/be4977b847f5d5cedb64d50eaaf2218c3a55a3a3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f4f59fdbc748805b08c13dae14c01f0518c77c94"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f96dc3adb9a97b8f3dfdb88796483491a3006b71"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48865.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-48865"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.8.0"},{"fixed":"5.10.106"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.29"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"5.16.15"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48865.json"}}],"schema_version":"1.7.5"}