CVE-2023-54223Network attack vector

Kernel memory corruption via AF_XDP buffer double-release

Published Dec 30, 2025 · Updated Dec 30, 2025

Memory corruption in the mlx5e AF_XDP legacy receive path in Linux 6.4.5 through 6.4.9 allows remote attackers to crash the kernel. In the XDP_REDIRECT path, the driver releases an XSK buffer that was already released, corrupting buffer pointers and kernel heap state. A target must run mlx5e with AF_XDP zero-copy on a legacy receive queue; crafted traffic can panic the kernel and expose or alter kernel data.

CVSS severity9.8
Critical
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the mlx5e AF_XDP legacy receive path in Linux 6.4.5 through 6.4.9 allows remote attackers to crash the kernel. In the XDP_REDIRECT path, the driver releases an XSK buffer that was already released, corrupting buffer pointers and kernel heap state. A target must run mlx5e with AF_XDP zero-copy on a legacy receive queue; crafted traffic can panic the kernel and expose or alter kernel data.

The record

CVE
CVE-2023-54223
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

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?

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

  1. Affected versionversion=6.4.5 <6.4.10
  2. Affected versionversion=7abd955a58fb0fcd4e756fa2065c03ae488fcfa7 <e0f52298fee449fec37e3e3c32df60008b509b16
  3. Affected versionversion=cbb5379362513cbff450df0457dc370da7244bec <58a113a35846d9a5bd759beb332e551e28451f09

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.4.5 <6.4.10; version=7abd955a58fb0fcd4e756fa2065c03ae488fcfa7 <e0f52298fee449fec37e3e3c32df60008b509b16; version=cbb5379362513cbff450df0457dc370da7244bec <58a113a35846d9a5bd759beb332e551e28451f09

Published CVSS scores

9.8Linux kernel CVE teamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
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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