CVE-2023-53512

Service interruption via unreleased PCIe lookup allocation

Published Oct 1, 2025 · Updated Oct 1, 2025

Memory leak in the Linux kernel mpt3sas driver from 4.16 allows local users to exhaust kernel memory and interrupt service during memory-pool release. The _base_release_memory_pools function destroys the PCIe SGL DMA pool but fails to free ioc->pcie_sg_lookup, retaining the lookup allocation when the adapter memory pools are released. Low-privileged local access is required, but public sources do not identify the operation by which such a user repeatedly reaches the release path.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory leak in the Linux kernel mpt3sas driver from 4.16 allows local users to exhaust kernel memory and interrupt service during memory-pool release. The _base_release_memory_pools function destroys the PCIe SGL DMA pool but fails to free ioc->pcie_sg_lookup, retaining the lookup allocation when the adapter memory pools are released. Low-privileged local access is required, but public sources do not identify the operation by which such a user repeatedly reaches the release path.

The record

CVE
CVE-2023-53512
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.16
  2. Affected versionversion=dbec4c9040edc15442c3ebdb65408aa9d3b82c24 <28137ea3eb05a87329a7154a8ff410d9e8bcc0a5
  3. Affected versionversion=dbec4c9040edc15442c3ebdb65408aa9d3b82c24 <30c7c72b6cf9d8c95f9b219c9d2e4e31b15bebe5
  4. Affected versionversion=dbec4c9040edc15442c3ebdb65408aa9d3b82c24 <378cc0eec4aa546ce1ae17515e2dfab719d4fb1e
  5. Affected versionversion=dbec4c9040edc15442c3ebdb65408aa9d3b82c24 <54dd96015e8d7a2a07359e2dfebf05b529d1780c
  6. Affected versionversion=dbec4c9040edc15442c3ebdb65408aa9d3b82c24 <847cdbdcd5a24c1eec9595161a23b88fef91ff42

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=dbec4c9040edc15442c3ebdb65408aa9d3b82c24 <28137ea3eb05a87329a7154a8ff410d9e8bcc0a5; version=dbec4c9040edc15442c3ebdb65408aa9d3b82c24 <30c7c72b6cf9d8c95f9b219c9d2e4e31b15bebe5; version=dbec4c9040edc15442c3ebdb65408aa9d3b82c24 <378cc0eec4aa546ce1ae17515e2dfab719d4fb1e; version=dbec4c9040edc15442c3ebdb65408aa9d3b82c24 <54dd96015e8d7a2a07359e2dfebf05b529d1780c; version=dbec4c9040edc15442c3ebdb65408aa9d3b82c24 <847cdbdcd5a24c1eec9595161a23b88fef91ff42

Published CVSS scores

5.5CanonicalCVSS: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

CWE-401Missing Release of Memory after Effective Lifetime
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo