CVE-2022-49338

Networking interruption via reversed CT and TC cleanup

Published Feb 26, 2025 · Updated May 11, 2026

Improper cleanup in Linux 5.18 through 5.18.3 allows local users to interrupt mlx5 networking during uplink representative teardown. In mlx5e_cleanup_rep_tx, connection-tracking cleanup destroys shared forwarding actions before traffic-control cleanup deletes offloaded tuples that still reference them. Reachability requires an mlx5 uplink representative with offloaded traffic-control connection-tracking rules, and teardown produces a kernel warning with availability impact limited to the affected networking path.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper cleanup in Linux 5.18 through 5.18.3 allows local users to interrupt mlx5 networking during uplink representative teardown. In mlx5e_cleanup_rep_tx, connection-tracking cleanup destroys shared forwarding actions before traffic-control cleanup deletes offloaded tuples that still reference them. Reachability requires an mlx5 uplink representative with offloaded traffic-control connection-tracking rules, and teardown produces a kernel warning with availability impact limited to the affected networking path.

The record

CVE
CVE-2022-49338
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.18
  2. Affected versionversion=d1a3138f7913014e0714cb1d3d44793d76fc38a1 <11bcc79f4bcd244145e6a2c04d5dc755303492a8
  3. Affected versionversion=d1a3138f7913014e0714cb1d3d44793d76fc38a1 <15ef9efa855cf405fadd78272e1e5d04e09a1cf3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=d1a3138f7913014e0714cb1d3d44793d76fc38a1 <11bcc79f4bcd244145e6a2c04d5dc755303492a8; version=d1a3138f7913014e0714cb1d3d44793d76fc38a1 <15ef9efa855cf405fadd78272e1e5d04e09a1cf3

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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