MediaTek MT8893 Bluetooth FW buffer underflow

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in MediaTek MT2718, MT6639, MT6653, MT6985, MT6989, MT6990, MT6991, MT7925, MT7927, MT8113, MT8115, MT8127, MT8163, MT8168, MT8169, MT8173, MT8183, MT8186, MT8188, MT8195, MT8196, MT8370, MT8390, MT8391, MT8395, MT8512, MT8516, MT8519, MT8676, MT8678, MT8695, MT8696, MT8698, MT8786, MT8792, MT8796 and MT8893. Affected by this vulnerability is an unknown functionality of the component Bluetooth FW. Such manipulation leads to buffer underflow. This vulnerability is referenced as CVE-2025-20694. It is possible to launch the attack remotely. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in MediaTek MT2718, MT6639, MT6653, MT6985, MT6989, MT6990, MT6991, MT7925, MT7927, MT8113, MT8115, MT8127, MT8163, MT8168, MT8169, MT8173, MT8183, MT8186, MT8188, MT8195, MT8196, MT8370, MT8390, MT8391, MT8395, MT8512, MT8516, MT8519, MT8676, MT8678, MT8695, MT8696, MT8698, MT8786, MT8792, MT8796 and MT8893. It has been rated as critical. Affected by this issue is an unknown functionality of the component Bluetooth FW. The manipulation with an unknown input leads to a buffer underflow vulnerability. Using CWE to declare the problem leads to CWE-124. The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer. Impacted is availability. CVE summarizes:

In Bluetooth FW, there is a possible system crash due to an uncaught exception. This could lead to remote denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09752821; Issue ID: MSV-3342.

The advisory is shared for download at corp.mediatek.com. This vulnerability is handled as CVE-2025-20694 since 11/01/2024. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Applying the patch ALPS09752821 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-20358). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer underflow
CWE: CWE-124 / 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: Patch
Status: 🔍

0-Day Time: 🔒

Patch: ALPS09752821

Timelineinfo

11/01/2024 CVE reserved
07/08/2025 +248 days Advisory disclosed
07/08/2025 +0 days VulDB entry created
07/08/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: MSV-3342
Status: Confirmed

CVE: CVE-2025-20694 (🔒)
GCVE (CVE): GCVE-0-2025-20694
GCVE (VulDB): GCVE-100-315260
EUVD: 🔒

Entryinfo

Created: 07/08/2025 07:27
Updated: 07/08/2025 08:29
Changes: 07/08/2025 07:27 (55), 07/08/2025 08:29 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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