{"cve":"CVE-2022-49558","nvd":{"published":"2025-02-26T07:01:31.597","modified":"2026-06-17T05:18:26.690","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: double hook unregistration in netns path\n\n__nft_release_hooks() is called from pre_netns exit path which\nunregisters the hooks, then the NETDEV_UNREGISTER event is triggered\nwhich unregisters the hooks again.\n\n[  565.221461] WARNING: CPU: 18 PID: 193 at net/netfilter/core.c:495 __nf_unregister_net_hook+0x247/0x270\n[...]\n[  565.246890] CPU: 18 PID: 193 Comm: kworker/u64:1 Tainted: G            E     5.18.0-rc7+ #27\n[  565.253682] Workqueue: netns cleanup_net\n[  565.257059] RIP: 0010:__nf_unregister_net_hook+0x247/0x270\n[...]\n[  565.297120] Call Trace:\n[  565.300900]  <TASK>\n[  565.304683]  nf_tables_flowtable_event+0x16a/0x220 [nf_tables]\n[  565.308518]  raw_notifier_call_chain+0x63/0x80\n[  565.312386]  unregister_netdevice_many+0x54f/0xb50\n\nUnregister and destroy netdev hook from netns pre_exit via kfree_rcu\nso the NETDEV_UNREGISTER path see unregistered hooks.","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/3fac8ce48fa9fd61ee9056d3ed48b2edefca8b82","https://git.kernel.org/stable/c/86c0154f4c3a56c5db8b9dd09e3ce885382c2c19","https://git.kernel.org/stable/c/9c413a8c8bb49cc16796371805ecb260e885bb2b","https://git.kernel.org/stable/c/a3940dcf552f2393d1e8f263b386593f98abe829","https://git.kernel.org/stable/c/b09e6ccf0d12f9356e8e3508d3e3dce126298538"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2022-49558","score":0.00269,"percentile":0.19179,"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."]}