CVE-2022-49333

Service interruption via unlocked mlx5 device pairing

Published Feb 26, 2025 · Updated May 23, 2026

An interface-locking flaw in affected Linux kernel releases allows local users to trigger a warning through an mlx5 E-Switch mode change. The mlx5 E-Switch offloads event path pairs devices without first filtering for LAG capability, then calls mlx5_get_next_phys_dev() without holding the required interface lock. Reaching the path requires local privileges and mlx5 E-Switch hardware; the unguarded call violates a lock assertion, with service interruption as the assessed consequence.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An interface-locking flaw in affected Linux kernel releases allows local users to trigger a warning through an mlx5 E-Switch mode change. The mlx5 E-Switch offloads event path pairs devices without first filtering for LAG capability, then calls mlx5_get_next_phys_dev() without holding the required interface lock. Reaching the path requires local privileges and mlx5 E-Switch hardware; the unguarded call violates a lock assertion, with service interruption as the assessed consequence.

The record

CVE
CVE-2022-49333
Published
Feb 26, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=4d253ea99fbac316cbe4bafaf36087b592c2cd49
  2. Affected versionversion=5.13.8 <5.14
  3. Affected versionversion=5.14
  4. Affected versionversion=dd3fddb82780bfa24124834edd90bbc63bd689cc <0cef0b7eb044bb8cfdaff4c1db55a8fd442f6bc9
  5. Affected versionversion=dd3fddb82780bfa24124834edd90bbc63bd689cc <3008e6a0049361e731b803c60fe8f3ab44e1d73f
  6. Affected versionversion=dd3fddb82780bfa24124834edd90bbc63bd689cc <cdbcdddb8076a09aa6ddaf20fd911fc787dca0e5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4d253ea99fbac316cbe4bafaf36087b592c2cd49; version=5.13.8 <5.14; version=5.14; version=dd3fddb82780bfa24124834edd90bbc63bd689cc <0cef0b7eb044bb8cfdaff4c1db55a8fd442f6bc9; version=dd3fddb82780bfa24124834edd90bbc63bd689cc <3008e6a0049361e731b803c60fe8f3ab44e1d73f; version=dd3fddb82780bfa24124834edd90bbc63bd689cc <cdbcdddb8076a09aa6ddaf20fd911fc787dca0e5

Published CVSS scores

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.

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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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