CVE-2023-53070

Service interruption via absent PPTT state mishandling

Published May 2, 2025 · Updated May 23, 2026

Denial of service in Linux kernel ACPI PPTT handling allows local users to disrupt systems without a PPTT during secondary CPU startup. acpi_get_pptt() fails to cache the table's known-absent state, so each secondary CPU calls acpi_get_table() and waits on a mutex from atomic context. Reachability requires an affected kernel on a multiprocessor system without PPTT data; the documented consequence is an invalid-context kernel warning and availability loss.

CVSS severity5.5
Medium
EPSS probability0.19%
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

Denial of service in Linux kernel ACPI PPTT handling allows local users to disrupt systems without a PPTT during secondary CPU startup. acpi_get_pptt() fails to cache the table's known-absent state, so each secondary CPU calls acpi_get_table() and waits on a mutex from atomic context. Reachability requires an affected kernel on a multiprocessor system without PPTT data; the documented consequence is an invalid-context kernel warning and availability loss.

The record

CVE
CVE-2023-53070
Published
May 2, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-252, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record 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=0c80f9e165f8f9cca743d7b6cbdb54362da297e0 <1318a07706bb2f8c65f88f39a16c2b5260bcdcd4
  2. Affected versionversion=0c80f9e165f8f9cca743d7b6cbdb54362da297e0 <91d7b60a65d9f71230ea09b86d2058a884a3c2af
  3. Affected versionversion=0c80f9e165f8f9cca743d7b6cbdb54362da297e0 <e0c1106d51b9abc8eae03c5522b20649b6a55f6e
  4. Affected versionversion=5.19.4 <5.20
  5. Affected versionversion=6.0
  6. Affected versionversion=f03d253ba71994b196f342a7acad448a56812a8c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0c80f9e165f8f9cca743d7b6cbdb54362da297e0 <1318a07706bb2f8c65f88f39a16c2b5260bcdcd4; version=0c80f9e165f8f9cca743d7b6cbdb54362da297e0 <91d7b60a65d9f71230ea09b86d2058a884a3c2af; version=0c80f9e165f8f9cca743d7b6cbdb54362da297e0 <e0c1106d51b9abc8eae03c5522b20649b6a55f6e; version=5.19.4 <5.20; version=6.0; version=f03d253ba71994b196f342a7acad448a56812a8c

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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-252Unchecked Return Value
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