{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2022-48855", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix kernel-infoleak for SCTP sockets\n\nsyzbot reported a kernel infoleak [1] of 4 bytes.\n\nAfter analysis, it turned out r->idiag_expires is not initialized\nif inet_sctp_diag_fill() calls inet_diag_msg_common_fill()\n\nMake sure to clear idiag_timer/idiag_retrans/idiag_expires\nand let inet_diag_msg_sctpasoc_fill() fill them again if needed.\n\n[1]\n\nBUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline]\nBUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:154 [inline]\nBUG: KMSAN: kernel-infoleak in _copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668\n instrument_copy_to_user include/linux/instrumented.h:121 [inline]\n copyout lib/iov_iter.c:154 [inline]\n _copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668\n copy_to_iter include/linux/uio.h:162 [inline]\n simple_copy_to_iter+0xf3/0x140 net/core/datagram.c:519\n __skb_datagram_iter+0x2d5/0x11b0 net/core/datagram.c:425\n skb_copy_datagram_iter+0xdc/0x270 net/core/datagram.c:533\n skb_copy_datagram_msg include/linux/skbuff.h:3696 [inline]\n netlink_recvmsg+0x669/0x1c80 net/netlink/af_netlink.c:1977\n sock_recvmsg_nosec net/socket.c:948 [inline]\n sock_recvmsg net/socket.c:966 [inline]\n __sys_recvfrom+0x795/0xa10 net/socket.c:2097\n __do_sys_recvfrom net/socket.c:2115 [inline]\n __se_sys_recvfrom net/socket.c:2111 [inline]\n __x64_sys_recvfrom+0x19d/0x210 net/socket.c:2111\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nUninit was created at:\n slab_post_alloc_hook mm/slab.h:737 [inline]\n slab_alloc_node mm/slub.c:3247 [inline]\n __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4975\n kmalloc_reserve net/core/skbuff.c:354 [inline]\n __alloc_skb+0x545/0xf90 net/core/skbuff.c:426\n alloc_skb include/linux/skbuff.h:1158 [inline]\n netlink_dump+0x3e5/0x16c0 net/netlink/af_netlink.c:2248\n __netlink_dump_start+0xcf8/0xe90 net/netlink/af_netlink.c:2373\n netlink_dump_start include/linux/netlink.h:254 [inline]\n inet_diag_handler_cmd+0x2e7/0x400 net/ipv4/inet_diag.c:1341\n sock_diag_rcv_msg+0x24a/0x620\n netlink_rcv_skb+0x40c/0x7e0 net/netlink/af_netlink.c:2494\n sock_diag_rcv+0x63/0x80 net/core/sock_diag.c:277\n netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]\n netlink_unicast+0x1093/0x1360 net/netlink/af_netlink.c:1343\n netlink_sendmsg+0x14d9/0x1720 net/netlink/af_netlink.c:1919\n sock_sendmsg_nosec net/socket.c:705 [inline]\n sock_sendmsg net/socket.c:725 [inline]\n sock_write_iter+0x594/0x690 net/socket.c:1061\n do_iter_readv_writev+0xa7f/0xc70\n do_iter_write+0x52c/0x1500 fs/read_write.c:851\n vfs_writev fs/read_write.c:924 [inline]\n do_writev+0x645/0xe00 fs/read_write.c:967\n __do_sys_writev fs/read_write.c:1040 [inline]\n __se_sys_writev fs/read_write.c:1037 [inline]\n __x64_sys_writev+0xe5/0x120 fs/read_write.c:1037\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBytes 68-71 of 2508 are uninitialized\nMemory access of size 2508 starts at ffff888114f9b000\nData copied to user address 00007f7fe09ff2e0\n\nCPU: 1 PID: 3478 Comm: syz-executor306 Not tainted 5.17.0-rc4-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011" } ] }, "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": "8f840e47f190", "version_value": "3fc0fd724d19" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "4.7", "status": "affected" }, { "version": "0", "lessThan": "4.7", "status": "unaffected", "versionType": "custom" }, { "version": "4.9.307", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.14.272", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.235", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.185", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.106", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.29", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.16.15", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/3fc0fd724d199e061432b66a8d85b7d48fe485f7", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/3fc0fd724d199e061432b66a8d85b7d48fe485f7" }, { "url": "https://git.kernel.org/stable/c/41a2864cf719c17294f417726edd411643462ab8", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/41a2864cf719c17294f417726edd411643462ab8" }, { "url": "https://git.kernel.org/stable/c/2d8fa3fdf4542a2174a72d92018f488d65d848c5", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/2d8fa3fdf4542a2174a72d92018f488d65d848c5" }, { "url": "https://git.kernel.org/stable/c/bbf59d7ae558940cfa2b36a287fd1e88d83f89f8", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/bbf59d7ae558940cfa2b36a287fd1e88d83f89f8" }, { "url": "https://git.kernel.org/stable/c/b7e4d9ba2ddb78801488b4c623875b81fb46b545", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/b7e4d9ba2ddb78801488b4c623875b81fb46b545" }, { "url": "https://git.kernel.org/stable/c/1502f15b9f29c41883a6139f2923523873282a83", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/1502f15b9f29c41883a6139f2923523873282a83" }, { "url": "https://git.kernel.org/stable/c/d828b0fe6631f3ae8709ac9a10c77c5836c76a08", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/d828b0fe6631f3ae8709ac9a10c77c5836c76a08" }, { "url": "https://git.kernel.org/stable/c/633593a808980f82d251d0ca89730d8bb8b0220c", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/633593a808980f82d251d0ca89730d8bb8b0220c" } ] }, "generator": { "engine": "bippy-c9c4e1df01b2" } }