CVE-2023-52667

Memory corruption via stale flow-table group pointer

Published May 17, 2024 · Updated Aug 5, 2026

Double free in the Linux kernel mlx5e flow-table setup allows local users to corrupt kernel memory after an allocation failure. fs_any_create_groups frees ft->g when kvzalloc fails but leaves the pointer set, so fs_any_create_table later frees it again through mlx5e_destroy_flow_table. Triggering requires low-privileged local access, the mlx5e flow-table path, and a failed second allocation; resulting corruption can expose or alter data or crash the host.

CVSS severity7.8
High
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

Double free in the Linux kernel mlx5e flow-table setup allows local users to corrupt kernel memory after an allocation failure. fs_any_create_groups frees ft->g when kvzalloc fails but leaves the pointer set, so fs_any_create_table later frees it again through mlx5e_destroy_flow_table. Triggering requires low-privileged local access, the mlx5e flow-table path, and a failed second allocation; resulting corruption can expose or alter data or crash the host.

The record

CVE
CVE-2023-52667
Published
May 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 <2897c981ee63e1be5e530b1042484626a10b26d8
  2. Affected versionversion=0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 <65a4ade8a6d205979292e88beeb6a626ddbd4779
  3. Affected versionversion=0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 <72a729868592752b5a294d27453da264106983b1
  4. Affected versionversion=0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 <aef855df7e1bbd5aa4484851561211500b22707e
  5. Affected versionversion=0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 <b2fa86b2aceb4bc9ada51cea90f61546d7512cbe
  6. Affected versionversion=5.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 <2897c981ee63e1be5e530b1042484626a10b26d8; version=0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 <65a4ade8a6d205979292e88beeb6a626ddbd4779; version=0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 <72a729868592752b5a294d27453da264106983b1; version=0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 <aef855df7e1bbd5aa4484851561211500b22707e; version=0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 <b2fa86b2aceb4bc9ada51cea90f61546d7512cbe; version=5.13

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/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.

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free
T1499.004Application or System Exploitation

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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