CVE-2023-52487

Local system crash via stale peer-flow linkage

Published Feb 29, 2024 · Updated May 11, 2026

Denial of service in Linux kernel 6.5 through 6.6.14, 6.7 through 6.7.2, and 6.8-rc1 allows local users to crash the system. mlx5e_tc_del_fdb_peer_flow leaves a referenced peer flow linked and its DUP flag set, so later teardown visits an uninitialized peer list head. Triggering the fault requires local access and concurrent peer-flow activity involving the mlx5e driver; the result is a kernel warning or NULL-pointer crash.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel 6.5 through 6.6.14, 6.7 through 6.7.2, and 6.8-rc1 allows local users to crash the system. mlx5e_tc_del_fdb_peer_flow leaves a referenced peer flow linked and its DUP flag set, so later teardown visits an uninitialized peer list head. Triggering the fault requires local access and concurrent peer-flow activity involving the mlx5e driver; the result is a kernel warning or NULL-pointer crash.

The record

CVE
CVE-2023-52487
Published
Feb 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 29, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.5
  2. Affected versionversion=9be6c21fdcf8a7ec48262bb76f78c17ac2761ac6 <74cec142f89bf85c6c99c5db957da9f663f9f16f
  3. Affected versionversion=9be6c21fdcf8a7ec48262bb76f78c17ac2761ac6 <d76fdd31f953ac5046555171620f2562715e9b71
  4. Affected versionversion=9be6c21fdcf8a7ec48262bb76f78c17ac2761ac6 <e24d6f5a7f2d95a98a46257a5a5a5381d572894f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.5; version=9be6c21fdcf8a7ec48262bb76f78c17ac2761ac6 <74cec142f89bf85c6c99c5db957da9f663f9f16f; version=9be6c21fdcf8a7ec48262bb76f78c17ac2761ac6 <d76fdd31f953ac5046555171620f2562715e9b71; version=9be6c21fdcf8a7ec48262bb76f78c17ac2761ac6 <e24d6f5a7f2d95a98a46257a5a5a5381d572894f

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

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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