{"cve":"CVE-2024-50085","nvd":{"published":"2024-10-29T01:15:05.400","modified":"2026-08-04T11:21:16.583","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: fix UaF read in mptcp_pm_nl_rm_addr_or_subflow\n\nSyzkaller reported this splat:\n\n  ==================================================================\n  BUG: KASAN: slab-use-after-free in mptcp_pm_nl_rm_addr_or_subflow+0xb44/0xcc0 net/mptcp/pm_netlink.c:881\n  Read of size 4 at addr ffff8880569ac858 by task syz.1.2799/14662\n\n  CPU: 0 UID: 0 PID: 14662 Comm: syz.1.2799 Not tainted 6.12.0-rc2-syzkaller-00307-g36c254515dc6 #0\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\n  Call Trace:\n   <TASK>\n   __dump_stack lib/dump_stack.c:94 [inline]\n   dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120\n   print_address_description mm/kasan/report.c:377 [inline]\n   print_report+0xc3/0x620 mm/kasan/report.c:488\n   kasan_report+0xd9/0x110 mm/kasan/report.c:601\n   mptcp_pm_nl_rm_addr_or_subflow+0xb44/0xcc0 net/mptcp/pm_netlink.c:881\n   mptcp_pm_nl_rm_subflow_received net/mptcp/pm_netlink.c:914 [inline]\n   mptcp_nl_remove_id_zero_address+0x305/0x4a0 net/mptcp/pm_netlink.c:1572\n   mptcp_pm_nl_del_addr_doit+0x5c9/0x770 net/mptcp/pm_netlink.c:1603\n   genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115\n   genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\n   genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210\n   netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2551\n   genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219\n   netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]\n   netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357\n   netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901\n   sock_sendmsg_nosec net/socket.c:729 [inline]\n   __sock_sendmsg net/socket.c:744 [inline]\n   ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2607\n   ___sys_sendmsg+0x135/0x1e0 net/socket.c:2661\n   __sys_sendmsg+0x117/0x1f0 net/socket.c:2690\n   do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]\n   __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386\n   do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411\n   entry_SYSENTER_compat_after_hwframe+0x84/0x8e\n  RIP: 0023:0xf7fe4579\n  Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00\n  RSP: 002b:00000000f574556c EFLAGS: 00000296 ORIG_RAX: 0000000000000172\n  RAX: ffffffffffffffda RBX: 000000000000000b RCX: 0000000020000140\n  RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\n  RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000\n  R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000\n  R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n   </TASK>\n\n  Allocated by task 5387:\n   kasan_save_stack+0x33/0x60 mm/kasan/common.c:47\n   kasan_save_track+0x14/0x30 mm/kasan/common.c:68\n   poison_kmalloc_redzone mm/kasan/common.c:377 [inline]\n   __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394\n   kmalloc_noprof include/linux/slab.h:878 [inline]\n   kzalloc_noprof include/linux/slab.h:1014 [inline]\n   subflow_create_ctx+0x87/0x2a0 net/mptcp/subflow.c:1803\n   subflow_ulp_init+0xc3/0x4d0 net/mptcp/subflow.c:1956\n   __tcp_set_ulp net/ipv4/tcp_ulp.c:146 [inline]\n   tcp_set_ulp+0x326/0x7f0 net/ipv4/tcp_ulp.c:167\n   mptcp_subflow_create_socket+0x4ae/0x10a0 net/mptcp/subflow.c:1764\n   __mptcp_subflow_connect+0x3cc/0x1490 net/mptcp/subflow.c:1592\n   mptcp_pm_create_subflow_or_signal_addr+0xbda/0x23a0 net/mptcp/pm_netlink.c:642\n   mptcp_pm_nl_fully_established net/mptcp/pm_netlink.c:650 [inline]\n   mptcp_pm_nl_work+0x3a1/0x4f0 net/mptcp/pm_netlink.c:943\n   mptcp_worker+0x15a/0x1240 net/mptcp/protocol.c:2777\n   process_one_work+0x958/0x1b30 kernel/workqueue.c:3229\n   process_scheduled_works kernel/workqueue.c:3310 [inline]\n   worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391\n   kthread+0x2c1/0x3a0 kernel/kthread.c:389\n   ret_from_fork+0x45/0x80 arch/x86/ke\n---truncated---","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-416"],"references":["https://git.kernel.org/stable/c/35301636439138b821f1f6169bd00d348ebd388a","https://git.kernel.org/stable/c/7b2e478abab0b3a33515433a6af563aebba773c1","https://git.kernel.org/stable/c/7decd1f5904a489d3ccdcf131972f94645681689","https://git.kernel.org/stable/c/a8c36ea4ef9a350816f6556c5c5b63810f84b538","https://git.kernel.org/stable/c/da3343bc0839b180fd9af9c27fa456d8231409f9"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:56:33.105311382+00:00"},"epss":{"cve":"CVE-2024-50085","score":0.0048,"percentile":0.41415,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}