CVE-2024-53042

Local service interruption via unlocked RCU traversal

Published Nov 19, 2024 · Updated May 23, 2026

Improper synchronization in Linux kernel IPv4 tunnel initialization allows local users to interrupt service through tunnel creation. The ip_tunnel_init_flow path calls an RCU-only l3mdev lookup without holding the RCU read lock, traversing the device list outside a reader section. Exploitation requires local low-privilege access; the published impact is limited to availability, with no confidentiality or integrity impact.

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

Improper synchronization in Linux kernel IPv4 tunnel initialization allows local users to interrupt service through tunnel creation. The ip_tunnel_init_flow path calls an RCU-only l3mdev lookup without holding the RCU read lock, traversing the device list outside a reader section. Exploitation requires local low-privilege access; the published impact is limited to availability, with no confidentiality or integrity impact.

The record

CVE
CVE-2024-53042
Published
Nov 19, 2024
Updated
May 23, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-662, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 19, 2024CVE 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

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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=5.10.227 <5.10.229; version=5.15.168 <5.15.171; version=5.18; version=760852df570747e500a9632d34cbbf4faef30855 <5edcb3fdb12c3d46a6e79eeeec27d925b80fc168; version=ab6c9463b137163ba53fc050bf2c72bed2c997b8 <e2742758c9c85c84e077ede5f916479f724e11c2; version=db53cd3d88dc328dea2e968c9c8d3b4294a8a674 <699b48fc31727792edf2cab3829586ae6ba649e2; version=db53cd3d88dc328dea2e968c9c8d3b4294a8a674 <6dfaa458fe923211c766238a224e0a3c0522935c; version=db53cd3d88dc328dea2e968c9c8d3b4294a8a674 <72c0f482e39c87317ebf67661e28c8d86c93e870; version=db53cd3d88dc328dea2e968c9c8d3b4294a8a674 <ad4a3ca6a8e886f6491910a3ae5d53595e40597d

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NISTCVSS: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.

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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-662Improper Synchronization
T1499.004Application or System Exploitation

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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