CVE-2023-52620

Local service interruption via anonymous set timeouts

Published Mar 21, 2024 · Updated Aug 5, 2026

Resource injection in the Linux kernel nf_tables subsystem allows local users to interrupt service via anonymous-set timeout parameters. The nf_tables_newset path accepts NFTA_SET_TIMEOUT and NFTA_SET_GC_INTERVAL for NFT_SET_ANONYMOUS sets, although userspace has no valid use for that combination. Exploitation requires local low-privileged access and complex conditions; published scoring limits the consequence to reduced availability.

CVSS severity2.5
Low
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

Resource injection in the Linux kernel nf_tables subsystem allows local users to interrupt service via anonymous-set timeout parameters. The nf_tables_newset path accepts NFTA_SET_TIMEOUT and NFTA_SET_GC_INTERVAL for NFT_SET_ANONYMOUS sets, although userspace has no valid use for that combination. Exploitation requires local low-privileged access and complex conditions; published scoring limits the consequence to reduced availability.

The record

CVE
CVE-2023-52620
Published
Mar 21, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-99, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 21, 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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=4.1; version=761da2935d6e18d178582dbdf315a3a458555505 <00b19ee0dcc1aef06294471ab489bae26d94524e; version=761da2935d6e18d178582dbdf315a3a458555505 <116b0e8e4673a5faa8a739a19b467010c4d3058c; version=761da2935d6e18d178582dbdf315a3a458555505 <49ce99ae43314d887153e07cec8bb6a647a19268; version=761da2935d6e18d178582dbdf315a3a458555505 <6f3ae02bbb62f151b19162d5fdc9fe3d48450323; version=761da2935d6e18d178582dbdf315a3a458555505 <b7be6c737a179a76901c872f6b4c1d00552d9a1b; version=761da2935d6e18d178582dbdf315a3a458555505 <e26d3009efda338f19016df4175f354a9bd0a4ab

Published CVSS scores

2.5NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
2.5Siemens ProductCERTCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
2.5CISA-ADPCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-99Improper Control of Resource Identifiers ('Resource Injection')
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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