CVE-2022-49558

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: double hook unregistration in netns path

__nft_release_hooks() is called from pre_netns exit path which unregisters the hooks, then the NETDEV_UNREGISTER event is triggered which unregisters the hooks again.

[ 565.221461] WARNING: CPU: 18 PID: 193 at net/netfilter/core.c:495 __nf_unregister_net_hook+0x247/0x270 [...] [ 565.246890] CPU: 18 PID: 193 Comm: kworker/u64:1 Tainted: G E 5.18.0-rc7+ #27 [ 565.253682] Workqueue: netns cleanup_net [ 565.257059] RIP: 0010:__nf_unregister_net_hook+0x247/0x270 [...] [ 565.297120] Call Trace: [ 565.300900] <TASK> [ 565.304683] nf_tables_flowtable_event+0x16a/0x220 [nf_tables] [ 565.308518] raw_notifier_call_chain+0x63/0x80 [ 565.312386] unregister_netdevice_many+0x54f/0xb50

Unregister and destroy netdev hook from netns pre_exit via kfree_rcu so the NETDEV_UNREGISTER path see unregistered hooks.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= b110391d1e806167254d3c7ae5d637191d913175, < b09e6ccf0d12f9356e8e3508d3e3dce126298538; >= 0a0e5d47670b753d3dbf88f3c77a97a30864d9bd, < 3fac8ce48fa9fd61ee9056d3ed48b2edefca8b82; >= 767d1216bff82507c945e92fe719dff2083bb2f4, < 9c413a8c8bb49cc16796371805ecb260e885bb2b; >= 767d1216bff82507c945e92fe719dff2083bb2f4, < a3940dcf552f2393d1e8f263b386593f98abe829; >= 767d1216bff82507c945e92fe719dff2083bb2f4, < 86c0154f4c3a56c5db8b9dd09e3ce885382c2c19; >= 767d1216bff82507c945e92fe719dff2083bb2f4, < f9a43007d3f7ba76d5e7f9421094f00f2ef202f8; >= 5.4.99, < 5.4.262; >= 5.10.17, < 5.10.198
LinuxLinux5.11

References

Timeline

Published
Feb 26, 2025
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2022-49558: Medium severity, CVSS 5.5 | Vulnix