{"cve":"CVE-2022-49662","nvd":{"published":"2025-02-26T07:01:41.230","modified":"2026-07-24T15:16:54.187","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix lockdep splat in in6_dump_addrs()\n\nAs reported by syzbot, we should not use rcu_dereference()\nwhen rcu_read_lock() is not held.\n\nWARNING: suspicious RCU usage\n5.19.0-rc2-syzkaller #0 Not tainted\n\nnet/ipv6/addrconf.c:5175 suspicious rcu_dereference_check() usage!\n\nother info that might help us debug this:\n\nrcu_scheduler_active = 2, debug_locks = 1\n1 lock held by syz-executor326/3617:\n #0: ffffffff8d5848e8 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0xae/0xc20 net/netlink/af_netlink.c:2223\n\nstack backtrace:\nCPU: 0 PID: 3617 Comm: syz-executor326 Not tainted 5.19.0-rc2-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n in6_dump_addrs+0x12d1/0x1790 net/ipv6/addrconf.c:5175\n inet6_dump_addr+0x9c1/0xb50 net/ipv6/addrconf.c:5300\n netlink_dump+0x541/0xc20 net/netlink/af_netlink.c:2275\n __netlink_dump_start+0x647/0x900 net/netlink/af_netlink.c:2380\n netlink_dump_start include/linux/netlink.h:245 [inline]\n rtnetlink_rcv_msg+0x73e/0xc90 net/core/rtnetlink.c:6046\n netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2501\n netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\n netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345\n netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921\n sock_sendmsg_nosec net/socket.c:714 [inline]\n sock_sendmsg+0xcf/0x120 net/socket.c:734\n ____sys_sendmsg+0x6eb/0x810 net/socket.c:2492\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2546\n __sys_sendmsg net/socket.c:2575 [inline]\n __do_sys_sendmsg net/socket.c:2584 [inline]\n __se_sys_sendmsg net/socket.c:2582 [inline]\n __x64_sys_sendmsg+0x132/0x220 net/socket.c:2582\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x46/0xb0","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":[],"references":["https://git.kernel.org/stable/c/2930ee1a166df0e12fe9fec4b79cc3dc9634ae45","https://git.kernel.org/stable/c/4e43e64d0f1332fcc503babad4dc31aead7131ca","https://git.kernel.org/stable/c/b39fda51c32dd879451e0119881f31493bf83283","https://git.kernel.org/stable/c/ea18594da69a09f68491da57f9fa09f003efbbc7"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2022-49662","score":0.00275,"percentile":0.20007,"date":"2026-10-31"},"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."]}