CVE-2022-49558
netfilter: nf_tables: double hook unregistration in netns path
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.28% · top 79% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected b110391d1e806167254d3c7ae5d637191d913175 – < b09e6ccf0d12f9356e8e3508d3e3dce126298538
- affected 0a0e5d47670b753d3dbf88f3c77a97a30864d9bd – < 3fac8ce48fa9fd61ee9056d3ed48b2edefca8b82
- affected 767d1216bff82507c945e92fe719dff2083bb2f4 – < 9c413a8c8bb49cc16796371805ecb260e885bb2b
- affected 767d1216bff82507c945e92fe719dff2083bb2f4 – < a3940dcf552f2393d1e8f263b386593f98abe829
- affected 767d1216bff82507c945e92fe719dff2083bb2f4 – < 86c0154f4c3a56c5db8b9dd09e3ce885382c2c19
- affected 767d1216bff82507c945e92fe719dff2083bb2f4 – < f9a43007d3f7ba76d5e7f9421094f00f2ef202f8
- affected 5.4.99 – < 5.4.262
- affected 5.10.17 – < 5.10.198
- affected 5.11
- unaffected < 5.11
- unaffected 5.4.262 – ≤ 5.4.*
- unaffected 5.10.198 – ≤ 5.10.*
- unaffected 5.15.45 – ≤ 5.15.*
- unaffected 5.17.13 – ≤ 5.17.*
- unaffected 5.18.2 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (6)
- https://git.kernel.org/stable/c/b09e6ccf0d12f9356e8e3508d3e3dce126298538 (opens in a new tab)
- https://git.kernel.org/stable/c/3fac8ce48fa9fd61ee9056d3ed48b2edefca8b82 (opens in a new tab)
- https://git.kernel.org/stable/c/9c413a8c8bb49cc16796371805ecb260e885bb2b (opens in a new tab)
- https://git.kernel.org/stable/c/a3940dcf552f2393d1e8f263b386593f98abe829 (opens in a new tab)
- https://git.kernel.org/stable/c/86c0154f4c3a56c5db8b9dd09e3ce885382c2c19 (opens in a new tab)
- https://git.kernel.org/stable/c/f9a43007d3f7ba76d5e7f9421094f00f2ef202f8 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49558)Record last updated .