CVE-2023-53507

Kernel warning via stale devlink parameters

Published Oct 1, 2025 · Updated Oct 1, 2025

Resource cleanup error in Linux 6.4 through 6.4.9 and 6.5-rc1 through 6.5-rc4 allows local users to trigger a shutdown warning. When an mlx5 interface is down, mlx5_unload leaves its devlink parameters registered before mlx5_devlink_free calls devlink_free. The documented consequence is a shutdown-path WARN on mlx5 systems; no pre-shutdown crash, data access, or code execution is reported.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource cleanup error in Linux 6.4 through 6.4.9 and 6.5-rc1 through 6.5-rc4 allows local users to trigger a shutdown warning. When an mlx5 interface is down, mlx5_unload leaves its devlink parameters registered before mlx5_devlink_free calls devlink_free. The documented consequence is a shutdown-path WARN on mlx5 systems; no pre-shutdown crash, data access, or code execution is reported.

The record

CVE
CVE-2023-53507
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record 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=6.4
  2. Affected versionversion=fe578cbb2f053f465e19d2671a523dcd01953888 <471f59b3455314f0cafacf3096453727876355a9
  3. Affected versionversion=fe578cbb2f053f465e19d2671a523dcd01953888 <53d737dfd3d7b023fa9fa445ea3f3db0ac9da402

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.4; version=fe578cbb2f053f465e19d2671a523dcd01953888 <471f59b3455314f0cafacf3096453727876355a9; version=fe578cbb2f053f465e19d2671a523dcd01953888 <53d737dfd3d7b023fa9fa445ea3f3db0ac9da402

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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 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

No sourced classifications are available.

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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