MediaTek MT8797 nvram out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in MediaTek MT2713, MT2735, MT6833, MT6835, MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6980, MT6983, MT6985, MT6990, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8185, MT8188, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8395, MT8666, MT8673, MT8675, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8791T and MT8797 (Chip Software) and classified as critical. Affected by this issue is an unknown function of the component nvram. 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. CVE summarizes:

In nvram, 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: ALPS07937113; Issue ID: ALPS07937113.

The weakness was presented 09/04/2023 as ALPS07937113. The advisory is available at This vulnerability is handled as CVE-2023-20821 since 10/28/2022. The technical details are unknown and an exploit is not available.

Applying the patch ALPS07937113 is able to eliminate this problem.






CPE 2.3info

CPE 2.2info


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: 🔒



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


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

Local: Yes
Remote: No

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: ALPS07937113


10/28/2022 CVE reserved
09/04/2023 +311 days Advisory disclosed
09/04/2023 +0 days VulDB entry created
09/30/2023 +26 days VulDB entry last update


Advisory: ALPS07937113
Status: Confirmed

CVE: CVE-2023-20821 (🔒)


Created: 09/04/2023 07:08 AM
Updated: 09/30/2023 07:34 AM
Changes: 09/04/2023 07:08 AM (41), 09/30/2023 07:34 AM (11)
Complete: 🔍


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