CVE-2024-24423Public exploitNetwork attack vector

MME crash via unsigned length underflow

Published Jan 21, 2025 · Updated Mar 18, 2025

Buffer overflow in Linux Foundation Magma 1.8.0 and earlier allows remote attackers to crash the MME via a malformed NAS packet. In decode_esm_message_container, subtracting decoded bytes from an unsigned length can underflow and bypass validation before decode_bstring reads attacker-controlled bytes. An unauthenticated mobile device can reach the parser through an Initial UE Message, and repeated crashes interrupt cellular service.

CVSS severity7.5
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Linux Foundation Magma 1.8.0 and earlier allows remote attackers to crash the MME via a malformed NAS packet. In decode_esm_message_container, subtracting decoded bytes from an unsigned length can underflow and bypass validation before decode_bstring reads attacker-controlled bytes. An unauthenticated mobile device can reach the parser through an Initial UE Message, and repeated crashes interrupt cellular service.

The record

CVE
CVE-2024-24423
Published
Jan 21, 2025
Updated
Mar 18, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2025Record 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

Public exploit references

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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