{"id":"CVE-2024-26663","summary":"tipc: Check the bearer type before calling tipc_udp_nl_bearer_add()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: Check the bearer type before calling tipc_udp_nl_bearer_add()\n\nsyzbot reported the following general protection fault [1]:\n\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087]\n...\nRIP: 0010:tipc_udp_is_known_peer+0x9c/0x250 net/tipc/udp_media.c:291\n...\nCall Trace:\n \u003cTASK\u003e\n tipc_udp_nl_bearer_add+0x212/0x2f0 net/tipc/udp_media.c:646\n tipc_nl_bearer_add+0x21e/0x360 net/tipc/bearer.c:1089\n genl_family_rcv_msg_doit+0x1fc/0x2e0 net/netlink/genetlink.c:972\n genl_family_rcv_msg net/netlink/genetlink.c:1052 [inline]\n genl_rcv_msg+0x561/0x800 net/netlink/genetlink.c:1067\n netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2544\n genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076\n netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\n netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367\n netlink_sendmsg+0x8b7/0xd70 net/netlink/af_netlink.c:1909\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg+0xd5/0x180 net/socket.c:745\n ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584\n ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638\n __sys_sendmsg+0x117/0x1e0 net/socket.c:2667\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nThe cause of this issue is that when tipc_nl_bearer_add() is called with\nthe TIPC_NLA_BEARER_UDP_OPTS attribute, tipc_udp_nl_bearer_add() is called\neven if the bearer is not UDP.\n\ntipc_udp_is_known_peer() called by tipc_udp_nl_bearer_add() assumes that\nthe media_ptr field of the tipc_bearer has an udp_bearer type object, so\nthe function goes crazy for non-UDP bearers.\n\nThis patch fixes the issue by checking the bearer type before calling\ntipc_udp_nl_bearer_add() in tipc_nl_bearer_add().","modified":"2026-04-02T10:05:20.603025Z","published":"2024-04-02T06:22:12.537Z","related":["SUSE-SU-2024:2802-1","SUSE-SU-2024:2892-1","SUSE-SU-2024:2894-1","SUSE-SU-2024:2896-1","SUSE-SU-2024:2901-1","SUSE-SU-2024:2939-1","SUSE-SU-2024:2940-1","SUSE-SU-2024:2947-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26663.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0cd331dfd6023640c9669d0592bc0fd491205f87"},{"type":"WEB","url":"https://git.kernel.org/stable/c/19d7314f2fb9515bdaac9829d4d8eb34edd1fe95"},{"type":"WEB","url":"https://git.kernel.org/stable/c/24ec8f0da93b8a9fba11600be8a90f0d73fb46f1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3871aa01e1a779d866fa9dfdd5a836f342f4eb87"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3d3a5b31b43515b5752ff282702ca546ec3e48b6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6f70f0b412458c622a12d4292782c8e92e210c2f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/888e3524be87f3df9fa3c083484e4b62b3e3bb59"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c1701ea85ef0ec7be6a1b36c7da69f572ed2fd12"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26663.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26663"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ef20cd4dd1633987bcf46ac34ace2c8af212361f"},{"fixed":"24ec8f0da93b8a9fba11600be8a90f0d73fb46f1"},{"fixed":"6f70f0b412458c622a12d4292782c8e92e210c2f"},{"fixed":"19d7314f2fb9515bdaac9829d4d8eb34edd1fe95"},{"fixed":"c1701ea85ef0ec7be6a1b36c7da69f572ed2fd12"},{"fixed":"3d3a5b31b43515b5752ff282702ca546ec3e48b6"},{"fixed":"888e3524be87f3df9fa3c083484e4b62b3e3bb59"},{"fixed":"0cd331dfd6023640c9669d0592bc0fd491205f87"},{"fixed":"3871aa01e1a779d866fa9dfdd5a836f342f4eb87"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26663.json"}}],"schema_version":"1.7.5"}