CVE-2022-50002

Kernel crash via stale mlx5 LAG readiness flag

Published Jun 18, 2025 · Updated May 11, 2026

A null-pointer dereference in Linux mlx5 LAG handling allows local users to crash the kernel after asymmetric PF registration and removal. The readiness flag is set when both PF device pointers exist, rather than after both netdevices register, and remains set if PF0 unloads before its netdevice is assigned. A system using mlx5 link aggregation is exposed when this sequence reaches mlx5_do_bond(), which passes a null PF pointer to mlx5_lag_is_multipath().

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A null-pointer dereference in Linux mlx5 LAG handling allows local users to crash the kernel after asymmetric PF registration and removal. The readiness flag is set when both PF device pointers exist, rather than after both netdevices register, and remains set if PF0 unloads before its netdevice is assigned. A system using mlx5 link aggregation is exposed when this sequence reaches mlx5_do_bond(), which passes a null PF pointer to mlx5_lag_is_multipath().

The record

CVE
CVE-2022-50002
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=5.14
  2. Affected versionversion=8a66e45859797e5dd77ff17dd37781f99d5f5b9b <4c040acf5744e87a7b3490f9ec8bedd0d15c9f29
  3. Affected versionversion=8a66e45859797e5dd77ff17dd37781f99d5f5b9b <a6e675a66175869b7d87c0e1dd0ddf93e04f8098

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=8a66e45859797e5dd77ff17dd37781f99d5f5b9b <4c040acf5744e87a7b3490f9ec8bedd0d15c9f29; version=8a66e45859797e5dd77ff17dd37781f99d5f5b9b <a6e675a66175869b7d87c0e1dd0ddf93e04f8098

Published CVSS scores

5.5CanonicalCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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