MediaTek MT8798 CDMA PPP out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as critical, has been found in MediaTek MT2731, MT6570, MT6580, MT6595, MT6732, MT6735, MT6737, MT6737M, MT6738, MT6739, MT6750, MT6750S, MT6752, MT6753, MT6755, MT6757, MT6758, MT6761, MT6762, MT6762D, MT6762M, MT6763, MT6765, MT6765T, MT6767, MT6768, MT6769, MT6769T, MT6769Z, MT6771, MT6775, MT6779, MT6781, MT6783, MT6785, MT6785T, MT6789, MT6795, MT6797, MT6799, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6873, MT6875, MT6875T, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6891, MT6893, MT6895, MT6895T, MT6896, MT6897, MT6983, MT6985, MT6989, MT8666, MT8666A, MT8667, MT8673, MT8675, MT8765, MT8766, MT8766Z, MT8768, MT8768A, MT8768B, MT8768T, MT8768Z, MT8781, MT8786, MT8788, MT8788T, MT8788X, MT8788Z, MT8791, MT8791T, MT8797 and MT8798 (Chip Software). This issue affects an unknown function of the component CDMA PPP Handler. 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 CDMA PPP protocol, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privilege needed. User interaction is not needed for exploitation. Patch ID: MOLY01068234; Issue ID: ALPS08010003.

The weakness was released 10/02/2023 as ALPS08010003. It is possible to read the advisory at The identification of this vulnerability is CVE-2023-20819 since 10/28/2022. The technical details are unknown and an exploit is not publicly available.

Applying the patch MOLY01068234 is able to eliminate this problem.






CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒



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


Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒


Threat Intelligenceinfo

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


Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: MOLY01068234


10/28/2022 CVE reserved
10/02/2023 +339 days Advisory disclosed
10/02/2023 +0 days VulDB entry created
10/23/2023 +21 days VulDB entry last update


Advisory: ALPS08010003
Status: Confirmed

CVE: CVE-2023-20819 (🔒)


Created: 10/02/2023 08:07 AM
Updated: 10/23/2023 08:37 AM
Changes: 10/02/2023 08:07 AM (41), 10/23/2023 08:37 AM (11)
Complete: 🔍


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