CVE-2023-40997Network attack vector

Remote service crash via malformed RMR packet

Published Aug 28, 2023 · Updated Aug 2, 2024

Buffer overflow in O-RAN Software Community ric-plt-lib-rmr 4.9.0 allows remote attackers to crash E2 Termination via a crafted RMR packet. The E2 Termination packet parser processes malformed RMR headers or payloads without robust validation, leading an unchecked buffer copy to corrupt memory. No authentication or user interaction is required; a successful packet crashes E2 Termination and disconnects the E2 interface.

CVSS severity7.5
High
EPSS probability2.23%
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 O-RAN Software Community ric-plt-lib-rmr 4.9.0 allows remote attackers to crash E2 Termination via a crafted RMR packet. The E2 Termination packet parser processes malformed RMR headers or payloads without robust validation, leading an unchecked buffer copy to corrupt memory. No authentication or user interaction is required; a successful packet crashes E2 Termination and disconnects the E2 interface.

The record

CVE
CVE-2023-40997
Published
Aug 28, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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

7.5NIST NVDCVSS: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.

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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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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