# CVE-2022-49662: linux: In the Linux kernel, the following vulnerability has been resolved:  ipv6: fix lockdep splat in in6_dump_addrs()  As...

CVE-2022-49662 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49662, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49662
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  ipv6: fix lockdep splat in in6_dump_addrs()  As reported by syzbot, we should not use rcu_dereference() when rcu_read_lock() is not held.  WARNING: suspicious RCU usage 5.19.0-rc2-syzkaller #0 Not tainted  net/ipv6/addrconf.c:5175 suspicious rcu_dereference_check() usage!  other info that might help us debug this:  rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor326/3617:  #0: ffffffff8d5848e8 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0xae/0xc20 net/netlink/af_netlink.c:2223  stack backtrace: CPU: 0 PID: 3617 Comm: syz-executor326 Not tainted 5.19.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace:  <TASK>  __dump_stack lib/dump_stack.c:88 [inline]  dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106  in6_dump_addrs+0x12d1/0x1790 net/ipv6/addrconf.c:5175  inet6_dump_addr+0x9c1/0xb50 net/ipv6/addrconf.c:5300  netlink_dump+0x541/0xc20 net/netlink/af_netlink.c:2275  __netlink_dump_start+0x647/0x900 net/netlink/af_netlink.c:2380  netlink_dump_start include/linux/netlink.h:245 [inline]  rtnetlink_rcv_msg+0x73e/0xc90 net/core/rtnetlink.c:6046  netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2501  netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]  netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345  netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921  sock_sendmsg_nosec net/socket.c:714 [inline]  sock_sendmsg+0xcf/0x120 net/socket.c:734  ____sys_sendmsg+0x6eb/0x810 net/socket.c:2492  ___sys_sendmsg+0xf3/0x170 net/socket.c:2546  __sys_sendmsg net/socket.c:2575 [inline]  __do_sys_sendmsg net/socket.c:2584 [inline]  __se_sys_sendmsg net/socket.c:2582 [inline]  __x64_sys_sendmsg+0x132/0x220 net/socket.c:2582  do_syscall_x64 arch/x86/entry/common.c:50 [inline]  do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80  entry_SYSCALL_64_after_hwframe+0x46/0xb0

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.14-1 | [DEBIAN-CVE-2022-49662](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49662.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.14-1 | [DEBIAN-CVE-2022-49662](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49662.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.14-1 | [DEBIAN-CVE-2022-49662](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49662.md) | Feb 26, 2025 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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