CVE-2022-49092: Software Security Vulnerability Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xjfw-5h96-mpm5",
  "modified" : "2025-10-14T21:30:25Z",
  "published" : "2025-10-14T21:30:25Z",
  "aliases" : [ "CVE-2022-49092" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv4: fix route with nexthop object delete warning\n\nFRR folks have hit a kernel warning[1] while deleting routes[2] which is\ncaused by trying to delete a route pointing to a nexthop id without\nspecifying nhid but matching on an interface. That is, a route is found\nbut we hit a warning while matching it. The warning is from\nfib_info_nh() in include/net/nexthop.h because we run it on a fib_info\nwith nexthop object. The call chain is:\n inet_rtm_delroute -> fib_table_delete -> fib_nh_match (called with a\nnexthop fib_info and also with fc_oif set thus calling fib_info_nh on\nthe fib_info and triggering the warning). The fix is to not do any\nmatching in that branch if the fi has a nexthop object because those are\nmanaged separately. I.e. we should match when deleting without nh spec and\nshould fail when deleting a nexthop route with old-style nh spec because\nnexthop objects are managed separately, e.g.:\n $ ip r show 1.2.3.4/32\n 1.2.3.4 nhid 12 via 192.168.11.2 dev dummy0\n\n $ ip r del 1.2.3.4/32\n $ ip r del 1.2.3.4/32 nhid 12\n <both should work>\n\n $ ip r del 1.2.3.4/32 dev dummy0\n <should fail with ESRCH>\n\n[1]\n [  523.462226] ------------[ cut here ]------------\n [  523.462230] WARNING: CPU: 14 PID: 22893 at include/net/nexthop.h:468 fib_nh_match+0x210/0x460\n [  523.462236] Modules linked in: dummy rpcsec_gss_krb5 xt_socket nf_socket_ipv4 nf_socket_ipv6 ip6table_raw iptable_raw bpf_preload xt_statistic ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs xt_mark nf_tables xt_nat veth nf_conntrack_netlink nfnetlink xt_addrtype br_netfilter overlay dm_crypt nfsv3 nfs fscache netfs vhost_net vhost vhost_iotlb tap tun xt_CHECKSUM xt_MASQUERADE xt_conntrack 8021q garp mrp ipt_REJECT nf_reject_ipv4 ip6table_mangle ip6table_nat iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bridge stp llc rfcomm snd_seq_dummy snd_hrtimer rpcrdma rdma_cm iw_cm ib_cm ib_core ip6table_filter xt_comment ip6_tables vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) qrtr bnep binfmt_misc xfs vfat fat squashfs loop nvidia_drm(POE) nvidia_modeset(POE) nvidia_uvm(POE) nvidia(POE) intel_rapl_msr intel_rapl_common snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi btusb btrtl iwlmvm uvcvideo btbcm snd_hda_intel edac_mce_amd\n [  523.462274]  videobuf2_vmalloc videobuf2_memops btintel snd_intel_dspcfg videobuf2_v4l2 snd_intel_sdw_acpi bluetooth snd_usb_audio snd_hda_codec mac80211 snd_usbmidi_lib joydev snd_hda_core videobuf2_common kvm_amd snd_rawmidi snd_hwdep snd_seq videodev ccp snd_seq_device libarc4 ecdh_generic mc snd_pcm kvm iwlwifi snd_timer drm_kms_helper snd cfg80211 cec soundcore irqbypass rapl wmi_bmof i2c_piix4 rfkill k10temp pcspkr acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc drm zram ip_tables crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel nvme sp5100_tco r8169 nvme_core wmi ipmi_devintf ipmi_msghandler fuse\n [  523.462300] CPU: 14 PID: 22893 Comm: ip Tainted: P           OE     5.16.18-200.fc35.x86_64 #1\n [  523.462302] Hardware name: Micro-Star International Co., Ltd. MS-7C37/MPG X570 GAMING EDGE WIFI (MS-7C37), BIOS 1.C0 10/29/2020\n [  523.462303] RIP: 0010:fib_nh_match+0x210/0x460\n [  523.462304] Code: 7c 24 20 48 8b b5 90 00 00 00 e8 bb ee f4 ff 48 8b 7c 24 20 41 89 c4 e8 ee eb f4 ff 45 85 e4 0f 85 2e fe ff ff e9 4c ff ff ff <0f> 0b e9 17 ff ff ff 3c 0a 0f 85 61 fe ff ff 48 8b b5 98 00 00 00\n [  523.462306] RSP: 0018:ffffaa53d4d87928 EFLAGS: 00010286\n [  523.462307] RAX: 0000000000000000 RBX: ffffaa53d4d87a90 RCX: ffffaa53d4d87bb0\n [  523.462308] RDX: ffff9e3d2ee6be80 RSI: ffffaa53d4d87a90 RDI: ffffffff920ed380\n [  523.462309] RBP: ffff9e3d2ee6be80 R08: 0000000000000064 R09: 0000000000000000\n [  523.462310] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000031\n [  523.462310] R13: 0000000000000020 R14: 0000000000000000 R15: ffff9e3d331054e0\n [  523.462311] FS:  00007f2455\n---truncated---",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-49092"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/63ea57478aaa3e06a597081a0f537318fc04e49f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6bf92d70e690b7ff12b24f4bfff5e5434d019b82"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/907c97986d6fa77318d17659dd76c94b65dd27c5"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dcd689f9e2640c992f94eae9955b106f71c6825d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f5064531c23ad646da7be8b938292b00a7e61438"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f8db5743d09523c0bb35f16e13691e3b7eb5dba0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2025-02-26T07:00:46Z"
  }
}