{"id":"CVE-2024-42106","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ninet_diag: Initialize pad field in struct inet_diag_req_v2\n\nKMSAN reported uninit-value access in raw_lookup() [1]","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ninet_diag: Initialize pad field in struct inet_diag_req_v2\n\nKMSAN reported uninit-value access in raw_lookup() [1]. Diag for raw\nsockets uses the pad field in struct in…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-908"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.10, < 4.19.318","linux_kernel >= 4.20, < 5.4.280","linux_kernel >= 5.5, < 5.10.222","linux_kernel >= 5.11, < 5.15.163","linux_kernel >= 5.16, < 6.1.98","linux_kernel >= 6.2, < 6.6.39","linux_kernel >= 6.7, < 6.9.9","linux_kernel = 6.10"],"patched":["linux_kernel 6.9.9"],"published":"2024-07-30","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:18:43.743","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-42106","references":[{"url":"https://git.kernel.org/stable/c/0184bf0a349f4cf9e663abbe862ff280e8e4dfa2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/61cf1c739f08190a4cbf047b9fbb192a94d87e3f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7094a5fd20ab66028f1da7f06e0f2692d70346f9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/76965648fe6858db7c5f3c700fef7aa5f124ca1c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7ef519c8efde152e0d632337f2994f6921e0b7e4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8366720519ea8d322a20780debdfd23d9fc0904a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d6f487e0704de2f2d15f8dd5d7d723210f2b2fdb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f9b2010e8af49fac9d9562146fb81744d8a9b051","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0184bf0a349f4cf9e663abbe862ff280e8e4dfa2","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/61cf1c739f08190a4cbf047b9fbb192a94d87e3f","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/7094a5fd20ab66028f1da7f06e0f2692d70346f9","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/76965648fe6858db7c5f3c700fef7aa5f124ca1c","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/7ef519c8efde152e0d632337f2994f6921e0b7e4","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/8366720519ea8d322a20780debdfd23d9fc0904a","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/d6f487e0704de2f2d15f8dd5d7d723210f2b2fdb","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/f9b2010e8af49fac9d9562146fb81744d8a9b051","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-613116.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00265,"epssPercentile":0.18579,"ingestedAt":"2026-10-15T03:30:12.729Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-09-10T16:17:46.157657Z"},"slug":"CVE-2024-42106","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ninet_diag: Initialize pad field in struct inet_diag_req_v2\n\nKMSAN reported uninit-value access in raw_lookup() [1]. Diag for raw\nsockets uses the pad field in struct inet_diag_req_v2 for the\nunderlying protocol. This field corresponds to the sdiag_raw_protocol\nfield in struct inet_diag_req_raw.\n\ninet_diag_get_exact_compat() converts inet_diag_req to\ninet_diag_req_v2, but leaves the pad field uninitialized. So the issue\noccurs when raw_lookup() accesses the sdiag_raw_protocol field.\n\nFix this by initializing the pad field in\ninet_diag_get_exact_compat(). Also, do the same fix in\ninet_diag_dump_compat() to avoid the similar issue in the future.\n\n[1]\nBUG: KMSAN: uninit-value in raw_lookup net/ipv4/raw_diag.c:49 [inline]\nBUG: KMSAN: uninit-value in raw_sock_get+0x657/0x800 net/ipv4/raw_diag.c:71\n raw_lookup net/ipv4/raw_diag.c:49 [inline]\n raw_sock_get+0x657/0x800 net/ipv4/raw_diag.c:71\n raw_diag_dump_one+0xa1/0x660 net/ipv4/raw_diag.c:99\n inet_diag_cmd_exact+0x7d9/0x980\n inet_diag_get_exact_compat net/ipv4/inet_diag.c:1404 [inline]\n inet_diag_rcv_msg_compat+0x469/0x530 net/ipv4/inet_diag.c:1426\n sock_diag_rcv_msg+0x23d/0x740 net/core/sock_diag.c:282\n netlink_rcv_skb+0x537/0x670 net/netlink/af_netlink.c:2564\n sock_diag_rcv+0x35/0x40 net/core/sock_diag.c:297\n netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]\n netlink_unicast+0xe74/0x1240 net/netlink/af_netlink.c:1361\n netlink_sendmsg+0x10c6/0x1260 net/netlink/af_netlink.c:1905\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg+0x332/0x3d0 net/socket.c:745\n ____sys_sendmsg+0x7f0/0xb70 net/socket.c:2585\n ___sys_sendmsg+0x271/0x3b0 net/socket.c:2639\n __sys_sendmsg net/socket.c:2668 [inline]\n __do_sys_sendmsg net/socket.c:2677 [inline]\n __se_sys_sendmsg net/socket.c:2675 [inline]\n __x64_sys_sendmsg+0x27e/0x4a0 net/socket.c:2675\n x64_sys_call+0x135e/0x3ce0 arch/x86/include/generated/asm/syscalls_64.h:47\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xd9/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUninit was stored to memory at:\n raw_sock_get+0x650/0x800 net/ipv4/raw_diag.c:71\n raw_diag_dump_one+0xa1/0x660 net/ipv4/raw_diag.c:99\n inet_diag_cmd_exact+0x7d9/0x980\n inet_diag_get_exact_compat net/ipv4/inet_diag.c:1404 [inline]\n inet_diag_rcv_msg_compat+0x469/0x530 net/ipv4/inet_diag.c:1426\n sock_diag_rcv_msg+0x23d/0x740 net/core/sock_diag.c:282\n netlink_rcv_skb+0x537/0x670 net/netlink/af_netlink.c:2564\n sock_diag_rcv+0x35/0x40 net/core/sock_diag.c:297\n netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]\n netlink_unicast+0xe74/0x1240 net/netlink/af_netlink.c:1361\n netlink_sendmsg+0x10c6/0x1260 net/netlink/af_netlink.c:1905\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg+0x332/0x3d0 net/socket.c:745\n ____sys_sendmsg+0x7f0/0xb70 net/socket.c:2585\n ___sys_sendmsg+0x271/0x3b0 net/socket.c:2639\n __sys_sendmsg net/socket.c:2668 [inline]\n __do_sys_sendmsg net/socket.c:2677 [inline]\n __se_sys_sendmsg net/socket.c:2675 [inline]\n __x64_sys_sendmsg+0x27e/0x4a0 net/socket.c:2675\n x64_sys_call+0x135e/0x3ce0 arch/x86/include/generated/asm/syscalls_64.h:47\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xd9/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nLocal variable req.i created at:\n inet_diag_get_exact_compat net/ipv4/inet_diag.c:1396 [inline]\n inet_diag_rcv_msg_compat+0x2a6/0x530 net/ipv4/inet_diag.c:1426\n sock_diag_rcv_msg+0x23d/0x740 net/core/sock_diag.c:282\n\nCPU: 1 PID: 8888 Comm: syz-executor.6 Not tainted 6.10.0-rc4-00217-g35bb670d65fc #32\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014\n\n## Affected\n\n- `linux_kernel >= 4.10, < 4.19.318`\n- `linux_kernel >= 4.20, < 5.4.280`\n- `linux_kernel >= 5.5, < 5.10.222`\n- `linux_kernel >= 5.11, < 5.15.163`\n- `linux_kernel >= 5.16, < 6.1.98`\n- `linux_kernel >= 6.2, < 6.6.39`\n- `linux_kernel >= 6.7, < 6.9.9`\n- `linux_kernel = 6.10`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.9.9`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}