CVE-2023-52658

Kernel crash via unchecked missing netdev

Published May 17, 2024 · Updated May 23, 2026

NULL-pointer dereference in affected Linux mlx5 kernels allows local users to crash the kernel by entering switchdev mode without a netdev. esw_offloads_devlink_ns_eq_netdev_ns dereferences the missing uplink_netdev while comparing its network namespace with the devlink namespace. Triggering requires local access, permission to change mlx5 E-switch mode, and an E-switch path with no net device; the documented consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL-pointer dereference in affected Linux mlx5 kernels allows local users to crash the kernel by entering switchdev mode without a netdev. esw_offloads_devlink_ns_eq_netdev_ns dereferences the missing uplink_netdev while comparing its network namespace with the devlink namespace. Triggering requires local access, permission to change mlx5 E-switch mode, and an E-switch path with no net device; the documented consequence is a kernel crash.

The record

CVE
CVE-2023-52658
Published
May 17, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2024CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.1.22 <6.1.162
  2. Affected versionversion=6.2.9 <6.3
  3. Affected versionversion=6.3
  4. Affected versionversion=662404b24a4c4d839839ed25e3097571f5938b9b <1bcdd66d33edb446903132456c948f0b764ef2f9
  5. Affected versionversion=662404b24a4c4d839839ed25e3097571f5938b9b <3fba8eab2cfc7334e0f132d29dfd2552f2f2a579
  6. Affected versionversion=662404b24a4c4d839839ed25e3097571f5938b9b <8deeefb24786ea7950b37bde4516b286c877db00
  7. Affected versionversion=882b988a3897062abed5f935de527797913f5876
  8. Affected versionversion=93260bd809e0ce44fda463ebc590376e24d8cc11 <136ccb2041a5d1a475f845d3bc138550be6f5daa

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1.22 <6.1.162; version=6.2.9 <6.3; version=6.3; version=662404b24a4c4d839839ed25e3097571f5938b9b <1bcdd66d33edb446903132456c948f0b764ef2f9; version=662404b24a4c4d839839ed25e3097571f5938b9b <3fba8eab2cfc7334e0f132d29dfd2552f2f2a579; version=662404b24a4c4d839839ed25e3097571f5938b9b <8deeefb24786ea7950b37bde4516b286c877db00; version=882b988a3897062abed5f935de527797913f5876; version=93260bd809e0ce44fda463ebc590376e24d8cc11 <136ccb2041a5d1a475f845d3bc138550be6f5daa

Published CVSS scores

5.5UbuntuCVSS: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.

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Technologies

Your stack

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Your stack

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