CVE-2022-49558

Medium

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.

Package Linux Kernel
Published 2025-02-26
Last modified 2025-10-22
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 5.4.99, 5.10.17, 5.11 and later are affected. Fixed in 5.4.262, 5.10.198, 5.15.45, 5.17.13, 5.18.2, 5.19 and their respective stable series.

Affected from
≥ 5.4.99 ≥ 5.10.17 ≥ 5.11
Fixed in
✓ 5.4.262 5.4.x ✓ 5.10.198 5.10.x ✓ 5.15.45 5.15.x ✓ 5.17.13 5.17.x ✓ 5.18.2 5.18.x ✓ 5.19

References

The following references provide additional information about CVE-2022-49558 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

6 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2022-49558?

    CVE-2022-49558 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.4.99 onward and has been patched in 5.4.262, 5.10.198, 5.15.45 and others. CVE-2022-49558 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2022-49558?

    CVE-2022-49558 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2022-49558?

    Yes — CVE-2022-49558 has been patched. Fixed versions include 5.4.262, 5.10.198, 5.15.45 and others. If you are running Linux kernel 5.4.99 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2022-49558 actively exploited?

    No — CVE-2022-49558 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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