CVE-2023-54200

Kernel crash via stale netdev hook teardown

Published Dec 30, 2025 · Updated Dec 30, 2025

Use-after-free in Linux kernel 5.15 nf_tables allows attackers to trigger a kernel crash during network namespace cleanup. The notifier ignores a netdevice unregister event while its namespace exits, so pre-exit hook teardown later dereferences freed device memory. Reaching the fault requires veth peers whose namespaces are both queued for removal; the public record does not specify the required privileges.

CVSS severityUnavailable
Unscored
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

Use-after-free in Linux kernel 5.15 nf_tables allows attackers to trigger a kernel crash during network namespace cleanup. The notifier ignores a netdevice unregister event while its namespace exits, so pre-exit hook teardown later dereferences freed device memory. Reaching the fault requires veth peers whose namespaces are both queued for removal; the public record does not specify the required privileges.

The record

CVE
CVE-2023-54200
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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?

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  1. Affected versionversion=5.15
  2. Affected versionversion=68a3765c659f809dcaac20030853a054646eb739 <30e4b13b1bfbdf3bf3b27036d8209ea1b9f0d880
  3. Affected versionversion=68a3765c659f809dcaac20030853a054646eb739 <8d56f00c61f67b450fbbdcb874855e60ad92c560
  4. Affected versionversion=68a3765c659f809dcaac20030853a054646eb739 <94032527efbac13be702c76afb9d872c0cca7a43
  5. Affected versionversion=68a3765c659f809dcaac20030853a054646eb739 <dc1c9fd4a8bbe1e06add9053010b652449bfe411
  6. Affected versionversion=90c7c58aa2bd02c65a4c63b7dfe0b16eab12cf9f

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=68a3765c659f809dcaac20030853a054646eb739 <30e4b13b1bfbdf3bf3b27036d8209ea1b9f0d880; version=68a3765c659f809dcaac20030853a054646eb739 <8d56f00c61f67b450fbbdcb874855e60ad92c560; version=68a3765c659f809dcaac20030853a054646eb739 <94032527efbac13be702c76afb9d872c0cca7a43; version=68a3765c659f809dcaac20030853a054646eb739 <dc1c9fd4a8bbe1e06add9053010b652449bfe411; version=90c7c58aa2bd02c65a4c63b7dfe0b16eab12cf9f

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
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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