CVE-2023-2794Public exploitNetwork attack vector

Remote code execution via unchecked SMS copy

Published Apr 10, 2024 · Updated Nov 4, 2025

Stack-based buffer overflow in oFono before 2.1 allows remote attackers to execute code by delivering a crafted SMS PDU. The decode_deliver() function derives a copy length from the untrusted user-data length and passes it to memcpy() without checking the destination size. A compromised modem, malicious base station, or crafted SMS can reach the decoder, causing memory corruption, a process crash, or code execution.

CVSS severity8.1
High
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in oFono before 2.1 allows remote attackers to execute code by delivering a crafted SMS PDU. The decode_deliver() function derives a copy length from the untrusted user-data length and passes it to memcpy() without checking the destination size. A compromised modem, malicious base station, or crafted SMS can reach the decoder, causing memory corruption, a process crash, or code execution.

The record

CVE
CVE-2023-2794
Published
Apr 10, 2024
Updated
Nov 4, 2025
Vendor
oFono
Product
oFono
Classifications
CWE-119, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

oFono · oFonoversion=0 <2.1

Published CVSS scores

8.1Fedora ProjectCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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 exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1203Exploitation for Client Execution

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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