{"id":"DEBIAN-CVE-2024-42106","details":"In the Linux kernel, the following vulnerability has been resolved:  inet_diag: Initialize pad field in struct inet_diag_req_v2  KMSAN reported uninit-value access in raw_lookup() [1]. Diag for raw sockets uses the pad field in struct inet_diag_req_v2 for the underlying protocol. This field corresponds to the sdiag_raw_protocol field in struct inet_diag_req_raw.  inet_diag_get_exact_compat() converts inet_diag_req to inet_diag_req_v2, but leaves the pad field uninitialized. So the issue occurs when raw_lookup() accesses the sdiag_raw_protocol field.  Fix this by initializing the pad field in inet_diag_get_exact_compat(). Also, do the same fix in inet_diag_dump_compat() to avoid the similar issue in the future.  [1] BUG: KMSAN: uninit-value in raw_lookup net/ipv4/raw_diag.c:49 [inline] BUG: KMSAN: uninit-value in raw_sock_get+0x657/0x800 net/ipv4/raw_diag.c:71  raw_lookup net/ipv4/raw_diag.c:49 [inline]  raw_sock_get+0x657/0x800 net/ipv4/raw_diag.c:71  raw_diag_dump_one+0xa1/0x660 net/ipv4/raw_diag.c:99  inet_diag_cmd_exact+0x7d9/0x980  inet_diag_get_exact_compat net/ipv4/inet_diag.c:1404 [inline]  inet_diag_rcv_msg_compat+0x469/0x530 net/ipv4/inet_diag.c:1426  sock_diag_rcv_msg+0x23d/0x740 net/core/sock_diag.c:282  netlink_rcv_skb+0x537/0x670 net/netlink/af_netlink.c:2564  sock_diag_rcv+0x35/0x40 net/core/sock_diag.c:297  netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]  netlink_unicast+0xe74/0x1240 net/netlink/af_netlink.c:1361  netlink_sendmsg+0x10c6/0x1260 net/netlink/af_netlink.c:1905  sock_sendmsg_nosec net/socket.c:730 [inline]  __sock_sendmsg+0x332/0x3d0 net/socket.c:745  ____sys_sendmsg+0x7f0/0xb70 net/socket.c:2585  ___sys_sendmsg+0x271/0x3b0 net/socket.c:2639  __sys_sendmsg net/socket.c:2668 [inline]  __do_sys_sendmsg net/socket.c:2677 [inline]  __se_sys_sendmsg net/socket.c:2675 [inline]  __x64_sys_sendmsg+0x27e/0x4a0 net/socket.c:2675  x64_sys_call+0x135e/0x3ce0 arch/x86/include/generated/asm/syscalls_64.h:47  do_syscall_x64 arch/x86/entry/common.c:52 [inline]  do_syscall_64+0xd9/0x1e0 arch/x86/entry/common.c:83  entry_SYSCALL_64_after_hwframe+0x77/0x7f  Uninit was stored to memory at:  raw_sock_get+0x650/0x800 net/ipv4/raw_diag.c:71  raw_diag_dump_one+0xa1/0x660 net/ipv4/raw_diag.c:99  inet_diag_cmd_exact+0x7d9/0x980  inet_diag_get_exact_compat net/ipv4/inet_diag.c:1404 [inline]  inet_diag_rcv_msg_compat+0x469/0x530 net/ipv4/inet_diag.c:1426  sock_diag_rcv_msg+0x23d/0x740 net/core/sock_diag.c:282  netlink_rcv_skb+0x537/0x670 net/netlink/af_netlink.c:2564  sock_diag_rcv+0x35/0x40 net/core/sock_diag.c:297  netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]  netlink_unicast+0xe74/0x1240 net/netlink/af_netlink.c:1361  netlink_sendmsg+0x10c6/0x1260 net/netlink/af_netlink.c:1905  sock_sendmsg_nosec net/socket.c:730 [inline]  __sock_sendmsg+0x332/0x3d0 net/socket.c:745  ____sys_sendmsg+0x7f0/0xb70 net/socket.c:2585  ___sys_sendmsg+0x271/0x3b0 net/socket.c:2639  __sys_sendmsg net/socket.c:2668 [inline]  __do_sys_sendmsg net/socket.c:2677 [inline]  __se_sys_sendmsg net/socket.c:2675 [inline]  __x64_sys_sendmsg+0x27e/0x4a0 net/socket.c:2675  x64_sys_call+0x135e/0x3ce0 arch/x86/include/generated/asm/syscalls_64.h:47  do_syscall_x64 arch/x86/entry/common.c:52 [inline]  do_syscall_64+0xd9/0x1e0 arch/x86/entry/common.c:83  entry_SYSCALL_64_after_hwframe+0x77/0x7f  Local variable req.i created at:  inet_diag_get_exact_compat net/ipv4/inet_diag.c:1396 [inline]  inet_diag_rcv_msg_compat+0x2a6/0x530 net/ipv4/inet_diag.c:1426  sock_diag_rcv_msg+0x23d/0x740 net/core/sock_diag.c:282  CPU: 1 PID: 8888 Comm: syz-executor.6 Not tainted 6.10.0-rc4-00217-g35bb670d65fc #32 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014","modified":"2026-09-15T09:02:57.674741450Z","published":"2024-07-30T08:15:03.100Z","upstream":["CVE-2024-42106"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-42106"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.98-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-42106.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.9-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-42106.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.9-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-42106.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}