{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2023-52845", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: Change nla_policy for bearer-related names to NLA_NUL_STRING\n\nsyzbot reported the following uninit-value access issue [1]:\n\n=====================================================\nBUG: KMSAN: uninit-value in strlen lib/string.c:418 [inline]\nBUG: KMSAN: uninit-value in strstr+0xb8/0x2f0 lib/string.c:756\n strlen lib/string.c:418 [inline]\n strstr+0xb8/0x2f0 lib/string.c:756\n tipc_nl_node_reset_link_stats+0x3ea/0xb50 net/tipc/node.c:2595\n genl_family_rcv_msg_doit net/netlink/genetlink.c:971 [inline]\n genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline]\n genl_rcv_msg+0x11ec/0x1290 net/netlink/genetlink.c:1066\n netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545\n genl_rcv+0x40/0x60 net/netlink/genetlink.c:1075\n netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]\n netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\n __sys_sendmsg net/socket.c:2624 [inline]\n __do_sys_sendmsg net/socket.c:2633 [inline]\n __se_sys_sendmsg net/socket.c:2631 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was created at:\n slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767\n slab_alloc_node mm/slub.c:3478 [inline]\n kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559\n __alloc_skb+0x318/0x740 net/core/skbuff.c:650\n alloc_skb include/linux/skbuff.h:1286 [inline]\n netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline]\n netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\n __sys_sendmsg net/socket.c:2624 [inline]\n __do_sys_sendmsg net/socket.c:2633 [inline]\n __se_sys_sendmsg net/socket.c:2631 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nTIPC bearer-related names including link names must be null-terminated\nstrings. If a link name which is not null-terminated is passed through\nnetlink, strstr() and similar functions can cause buffer overrun. This\ncauses the above issue.\n\nThis patch changes the nla_policy for bearer-related names from NLA_STRING\nto NLA_NUL_STRING. This resolves the issue by ensuring that only\nnull-terminated strings are accepted as bearer-related names.\n\nsyzbot reported similar uninit-value issue related to bearer names [2]. The\nroot cause of this issue is that a non-null-terminated bearer name was\npassed. This patch also resolved this issue." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "7be57fc69184", "version_value": "6744008c354b" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "3.19", "status": "affected" }, { "version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "custom" }, { "version": "4.14.330", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.299", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.261", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.201", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.139", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.63", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.5.12", "lessThanOrEqual": "6.5.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.2", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.7", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/6744008c354bca2e4686a5b6056ee6b535d9f67d", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/6744008c354bca2e4686a5b6056ee6b535d9f67d" }, { "url": "https://git.kernel.org/stable/c/2426425d686b43adbc4f2f4a367b494f06f159d6", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/2426425d686b43adbc4f2f4a367b494f06f159d6" }, { "url": "https://git.kernel.org/stable/c/2199260c42e6fbc5af8adae3bf78e623407c91b0", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/2199260c42e6fbc5af8adae3bf78e623407c91b0" }, { "url": "https://git.kernel.org/stable/c/b33d130f07f1decd756b849ab03c23d11d4dd294", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/b33d130f07f1decd756b849ab03c23d11d4dd294" }, { "url": "https://git.kernel.org/stable/c/3907b89cd17fcc23e9a80789c36856f00ece0ba8", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/3907b89cd17fcc23e9a80789c36856f00ece0ba8" }, { "url": "https://git.kernel.org/stable/c/4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4" }, { "url": "https://git.kernel.org/stable/c/abc1582119e8c4af14cedb0db6541fd603f45a04", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/abc1582119e8c4af14cedb0db6541fd603f45a04" }, { "url": "https://git.kernel.org/stable/c/560992f41c0cea44b7603bc9e6c73bffbf6b5709", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/560992f41c0cea44b7603bc9e6c73bffbf6b5709" }, { "url": "https://git.kernel.org/stable/c/19b3f72a41a8751e26bffc093bb7e1cef29ad579", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/19b3f72a41a8751e26bffc093bb7e1cef29ad579" } ] }, "generator": { "engine": "bippy-a5840b7849dd" } }