MediaTek MT6879/MT6895/MT6983/MT8791/MT8791T/MT8797 ril out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in MediaTek MT6879, MT6895, MT6983, MT8791, MT8791T and MT8797. The affected element is an unknown function of the component ril. The manipulation leads to out-of-bounds write. This vulnerability is traded as CVE-2023-20640. An attack has to be approached locally. There is no exploit available. It is suggested to install a patch to address this issue. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Detailsinfo

A vulnerability was found in MediaTek MT6879, MT6895, MT6983, MT8791, MT8791T and MT8797 (Chip Software). It has been rated as critical. This issue affects an unknown code of the component ril. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In ril, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07629573; Issue ID: ALPS07629573.

The weakness was shared 03/08/2023 as ALPS07629573. The advisory is shared at corp.mediatek.com. The identification of this vulnerability is CVE-2023-20640 since 10/28/2022. Neither technical details nor an exploit are publicly available.

Applying the patch ALPS07629573 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-24819). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

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

NVD Base Score: 6.7
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / 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: ALPS07629573

Timelineinfo

10/28/2022 🔍
03/08/2023 +131 days 🔍
03/08/2023 +0 days 🔍
08/28/2025 +904 days 🔍

Sourcesinfo

Advisory: ALPS07629573
Status: Confirmed

CVE: CVE-2023-20640 (🔍)
GCVE (CVE): GCVE-0-2023-20640
GCVE (VulDB): GCVE-100-222569
EUVD: 🔍

Entryinfo

Created: 03/08/2023 09:58 AM
Updated: 08/28/2025 09:00 PM
Changes: 03/08/2023 09:58 AM (41), 04/01/2023 05:15 PM (11), 08/28/2025 09:00 PM (16)
Complete: 🔍
Cache ID: 244:41A:40

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