CVE-2024-39343Network attack vector

Service interruption via unchecked Mobility Management length

Published Dec 2, 2024 · Updated Dec 3, 2024

Improper length validation in Samsung Exynos baseband software allows remote attackers to interrupt affected mobile and wearable devices. The baseband accepts a length supplied by the MM (Mobility Management) module without properly checking it, allowing malformed length data to trigger denial of service. The network attack is unauthenticated, requires no user interaction, and has high complexity; public sources do not specify whether interruption means a crash, hang, or reboot.

CVSS severity7.0
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper length validation in Samsung Exynos baseband software allows remote attackers to interrupt affected mobile and wearable devices. The baseband accepts a length supplied by the MM (Mobility Management) module without properly checking it, allowing malformed length data to trigger denial of service. The network attack is unauthenticated, requires no user interaction, and has high complexity; public sources do not specify whether interruption means a crash, hang, or reboot.

The record

CVE
CVE-2024-39343
Published
Dec 2, 2024
Updated
Dec 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1284, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.0MITRECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
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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