MediaTek MT8891 vdec use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in MediaTek MT6789, MT6855, MT6879, MT6895, MT6983, MT8673, MT8781, MT8795T, MT8798 and MT8891. This impacts an unknown function of the component vdec. The manipulation results in use after free. This vulnerability is cataloged as CVE-2023-20684. The attack must be initiated from a local position. There is no exploit available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as problematic has been found in MediaTek MT6789, MT6855, MT6879, MT6895, MT6983, MT8673, MT8781, MT8795T, MT8798 and MT8891 (Chip Software). Affected is some unknown functionality of the component vdec. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In vdec, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07671069; Issue ID: ALPS07671069.

The weakness was shared 04/07/2023 as ALPS07671069. The advisory is available at corp.mediatek.com. This vulnerability is traded as CVE-2023-20684 since 10/28/2022. The technical details are unknown and an exploit is not available.

Applying the patch ALPS07671069 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-24863). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.4
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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: ALPS07671069

Timelineinfo

10/28/2022 🔍
04/07/2023 +161 days 🔍
04/07/2023 +0 days 🔍
08/31/2025 +877 days 🔍

Sourcesinfo

Advisory: ALPS07671069
Status: Confirmed

CVE: CVE-2023-20684 (🔍)
GCVE (CVE): GCVE-0-2023-20684
GCVE (VulDB): GCVE-100-225234
EUVD: 🔍

Entryinfo

Created: 04/07/2023 09:01
Updated: 08/31/2025 20:05
Changes: 04/07/2023 09:01 (40), 04/24/2023 10:03 (11), 08/31/2025 20:05 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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