CVE-2023-4233: A flaw was found in ofono, an Open Source Telephony on Linux

Q: How do I fix CVE-2023-4233?

ofono: upgrade to 2.1; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2023-4233 being exploited?

CVE-2023-4233 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-4233 affect?

CVE-2023-4233 affects ofono, fedora. Severity is high (CVSS 8.1). A flaw was found in ofono, an Open Source Telephony on Linux. A stack overflow bug is triggered within the sms_decode_address_field() function during the SMS PDU decoding. It is assumed that the attack scenario is accessible from a compromi

Q: How urgent is CVE-2023-4233?

Priority 54/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 8.1REMOTEWATCHLISTUPGRADEMITIGATE

CVE-2023-4233 is a high-severity flaw (CVSS 8.1) affecting ofono, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in ofono, an Open Source Telephony on Linux. A stack overflow bug is triggered within the sms_decode_address_field() function during the SMS PDU decoding. It is assumed that the attack scenario is accessible from a compromised modem, a malicious base station, or just SMS.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-119
Published	2024-04-17
Last modified	2026-06-17

Publisher (CNA): Fedora Project · Vendor: fedoraproject · ofono project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-04-17 23:15 UTCPublished CVE record published
2026-06-17 06:37 UTCUpdated Record last modified

ofono project ofono UPGRADE

Affected: < 2.1

Fixed in: 2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ofono || rpm -q ofono || ofono --version

2. UPGRADE to 2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ofono

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ofono

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

fedoraproject fedora MITIGATE

Affected: 38 · 39 · 40

Fixed in: no fixed release known

Safe to downgrade to: a release before 38

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-4233?

ofono: upgrade to 2.1; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-4233 being exploited?

CVE-2023-4233 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-4233 affect?

CVE-2023-4233 affects ofono, fedora. Severity is high (CVSS 8.1). A flaw was found in ofono, an Open Source Telephony on Linux. A stack overflow bug is triggered within the sms_decode_address_field() function during the SMS PDU decoding. It is assumed that the attack scenario is accessible from a compromi

How urgent is CVE-2023-4233?

Priority 54/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2024-7547 HIGH 7.8 DOWNGRADE oFono SMS Decoder Stack-based Buffer Overflow Privilege Escalation Vulnerability
CVE-2024-7546 HIGH 7.8 DOWNGRADE oFono SimToolKit Heap-based Buffer Overflow Privilege Escalation Vulnerability
CVE-2024-7545 HIGH 7.8 DOWNGRADE oFono SimToolKit Heap-based Buffer Overflow Privilege Escalation Vulnerability
CVE-2024-7544 HIGH 7.8 DOWNGRADE oFono SimToolKit Heap-based Buffer Overflow Privilege Escalation Vulnerability
CVE-2024-7543 HIGH 7.8 DOWNGRADE oFono SimToolKit Heap-based Buffer Overflow Privilege Escalation Vulnerability

References

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