Samsung Exynos Auto T5123 5G SM Message Codec buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Samsung Exynos 1280, Exynos 2200, Exynos Modem 5123, Exynos Modem 5300 and Exynos Auto T5123. It has been declared as critical. The impacted element is an unknown function of the component 5G SM Message Codec. The manipulation results in an unknown weakness. This vulnerability is known as CVE-2023-26076. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Samsung Exynos 1280, Exynos 2200, Exynos Modem 5123, Exynos Modem 5300 and Exynos Auto T5123. It has been classified as critical. Affected is some unknown processing of the component 5G SM Message Codec. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Samsung Mobile Chipset and Baseband Modem Chipset for Exynos 1280, Exynos 2200, Exynos Modem 5123, Exynos Modem 5300, and Exynos Auto T5123. An intra-object overflow in the 5G SM message codec can occur due to insufficient parameter validation when decoding reserved options.

The weakness was published 03/13/2023. The advisory is shared for download at semiconductor.samsung.com. This vulnerability is traded as CVE-2023-26076 since 02/19/2023. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/03/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-29950). Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 7.6
CNA Vector (MITRE): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/19/2023 🔍
03/13/2023 +22 days 🔍
03/13/2023 +0 days 🔍
11/03/2025 +966 days 🔍

Sourcesinfo

Vendor: samsung.com

Advisory: 171400
Status: Confirmed

CVE: CVE-2023-26076 (🔍)
GCVE (CVE): GCVE-0-2023-26076
GCVE (VulDB): GCVE-100-222900
EUVD: 🔍

Entryinfo

Created: 03/13/2023 18:27
Updated: 11/03/2025 17:54
Changes: 03/13/2023 18:27 (45), 04/04/2023 18:50 (1), 04/04/2023 18:58 (12), 11/03/2025 17:54 (16)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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