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Announcement
Report Vulnerability
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Security Bulletin
Acknowledgements


JULY 2022 PRODUCT SECURITY BULLETIN

Published 2022-07-04
The MediaTek Product Security Bulletin contains details of security
vulnerabilities affecting MediaTek Smartphone, Tablet, AIoT, Smart display,
Smart platform, OTT and TV chipsets. Device OEMs have been notified of all the
issues and the corresponding security patches for at least two months before
publication.

The severity of the identified vulnerabilities was conducted based on the Common
Vulnerability Scoring System version 3.1 (CVSS v3.1).




SUMMARY



Severity CVEs High CVE-2022-20082, CVE-2022-21763, CVE-2022-21764,
CVE-2022-21744, CVE-2022-20083, CVE-2022-21767, CVE-2022-21768 Medium
CVE-2022-21765, CVE-2022-21766, CVE-2022-21769, CVE-2022-21770, CVE-2022-21771,
CVE-2022-21772, CVE-2022-21773, CVE-2022-21774, CVE-2022-21775, CVE-2022-21776,
CVE-2022-21777, CVE-2022-21779, CVE-2022-21780, CVE-2022-21781, CVE-2022-21782,
CVE-2022-21783, CVE-2022-21784, CVE-2022-21785, CVE-2022-21786, CVE-2022-21787




DETAILS





CVE CVE-2022-20082 Title Concurrent execution using shared resource with
improper synchronization ('race condition') in GPU Severity High Vulnerability
Type EoP CWE CWE-362 Concurrent Execution using Shared Resource with Improper
Synchronization ('Race Condition') Description In GPU, there is a possible use
after free due to a race condition. This could lead to local escalation of
privilege with no additional execution privileges needed. User interaction is
not needed for exploitation. Affected Chipsets MT6768, MT6769, MT6781, MT6785,
MT6789, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885,
MT6889, MT6893, MT6895, MT6983 Affected Software Versions Android 10.0, 11.0,
12.0







CVE CVE-2022-21763 Title Improper access control in telecom service Severity
High Vulnerability Type ID CWE CWE-284 Improper Access Control Description In
telecom service, there is a possible information disclosure due to a missing
permission check. This could lead to local information disclosure with no
additional execution privileges needed. User interaction is not needed for
exploitation. Affected Chipsets MT6739, MT6761, MT6762, MT6763, MT6765, MT6768,
MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6795, MT6797, MT6799, MT6833,
MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6889,
MT6890, MT6891, MT6893, MT6895, MT6983, MT6985, MT8321, MT8666, MT8667, MT8675,
MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797 Affected Software
Versions Android 10.0, 11.0, 12.0







CVE CVE-2022-21764 Title Improper access control in telecom service Severity
High Vulnerability Type ID CWE CWE-284 Improper Access Control Description In
telecom service, there is a possible information disclosure due to a missing
permission check. This could lead to local information disclosure with no
additional execution privileges needed. User interaction is not needed for
exploitation. Affected Chipsets MT6739, MT6761, MT6762, MT6763, MT6765, MT6768,
MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6795, MT6797, MT6799, MT6833,
MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6889,
MT6890, MT6891, MT6893, MT6895, MT6983, MT6985, MT8321, MT8666, MT8667, MT8675,
MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797 Affected Software
Versions Android 10.0, 11.0, 12.0







CVE CVE-2022-21744 Title Out-of-bounds write in Modem 2G RR Severity High
Vulnerability Type RCE CWE CWE-787 Out-of-bounds Write Description In Modem 2G
RR, there is a possible out of bounds write due to a missing bounds check. This
could lead to remote code execution when decoding GPRS Packet Neighbour Cell
Data (PNCD) improper neighbouring cell size with no additional execution
privileges needed. User interaction is not needed for exploitation. Affected
Chipsets MT2731, MT2735, MT6297, MT6725, MT6735, MT6737, MT6739, MT6750,
MT6750S, MT6755, MT6757, MT6757P, MT6758, MT6761, MT6762, MT6762D, MT6762M,
MT6763, MT6765, MT6765T, MT6767, MT6768, MT6769, MT6769T, MT6769Z, MT6771,
MT6775, MT6779, MT6781, MT6783, MT6785, MT6785T, MT6789, MT6797, MT6799, MT6833,
MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6889,
MT6890, MT6891, MT6893, MT6895, MT6983, MT8666, MT8667, MT8675, MT8735A,
MT8735B, MT8765, MT8766, MT8768, MT8771, MT8781, MT8786, MT8788, MT8789, MT8791,
MT8797 Affected Software Versions Modem LR9, LR11, LR12, LR12A, LR13, NR15, NR16







CVE CVE-2022-20083 Title Out-of-bounds write in Modem 2G/3G CC Severity High
Vulnerability Type RCE CWE CWE-787 Out-of-bounds Write Description In Modem
2G/3G CC, there is a possible out of bounds write due to a missing bounds check.
This could lead to remote code execution when decoding combined FACILITY with no
additional execution privileges needed. User interaction is not needed for
exploitation. Affected Chipsets MT2731, MT2735, MT6297, MT6725, MT6735, MT6737,
MT6739, MT6750, MT6750S, MT6755, MT6757, MT6757P, MT6758, MT6761, MT6762,
MT6762D, MT6762M, MT6763, MT6765, MT6765T, MT6767, MT6768, MT6769, MT6769T,
MT6769Z, MT6771, MT6775, MT6779, MT6781, MT6783, MT6785, MT6785T, MT6789,
MT6797, MT6799, MT6833, MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6880,
MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT6895, MT6983, MT8666, MT8667,
MT8675, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8771, MT8781, MT8786,
MT8788, MT8789, MT8791, MT8797 Affected Software Versions Modem LR9, LR11, LR12,
LR12A, LR13, NR15, NR16







CVE CVE-2022-21767 Title Heap-based buffer overflow in Bluetooth Severity High
Vulnerability Type EoP CWE CWE-122 Heap-based Buffer Overflow Description In
Bluetooth, there is a possible out of bounds write due to a missing bounds
check. This could lead to local escalation of privilege with no additional
execution privileges needed. User interaction is not needed for exploitation.
Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385 Affected
Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0







CVE CVE-2022-21768 Title Heap-based buffer overflow in Bluetooth Severity High
Vulnerability Type EoP CWE CWE-122 Heap-based Buffer Overflow Description In
Bluetooth, there is a possible out of bounds write due to a missing bounds
check. This could lead to local escalation of privilege with no additional
execution privileges needed. User interaction is not needed for exploitation.
Affected Chipsets MT8167S, MT8175, MT8183, MT8362A, MT8365, MT8385 Affected
Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0







CVE CVE-2022-21765 Title Improper input validation in CCCI Severity Medium
Vulnerability Type EoP CWE CWE-20 Improper Input Validation Description In CCCI,
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. Affected Chipsets
MT6580, MT6735, MT6737, MT6739, MT6753, MT6761, MT6765, MT6768, MT6771, MT6779,
MT6781, MT6785, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889,
MT6893, MT6895, MT6983, MT8321, MT8666, MT8667, MT8675, MT8765, MT8766, MT8768,
MT8786, MT8788, MT8789, MT8791, MT8797 Affected Software Versions Android 10.0,
11.0, 12.0







CVE CVE-2022-21766 Title Improper input validation in CCCI Severity Medium
Vulnerability Type EoP CWE CWE-20 Improper Input Validation Description In CCCI,
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. Affected Chipsets
MT6580, MT6735, MT6737, MT6739, MT6753, MT6761, MT6765, MT6768, MT6771, MT6779,
MT6781, MT6785, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889,
MT6893, MT6895, MT6983, MT8321, MT8666, MT8667, MT8675, MT8765, MT8766, MT8768,
MT8786, MT8788, MT8789, MT8791, MT8797 Affected Software Versions Android 10.0,
11.0, 12.0







CVE CVE-2022-21769 Title Improper input validation in CCCI Severity Medium
Vulnerability Type ID CWE CWE-20 Improper Input Validation Description In CCCI,
there is a possible out of bounds read due to a missing bounds check. This could
lead to local information disclosure with System execution privileges needed.
User interaction is not needed for exploitation. Affected Chipsets MT6580,
MT6735, MT6737, MT6739, MT6753, MT6761, MT6765, MT6768, MT6771, MT6779, MT6781,
MT6785, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893,
MT6895, MT6983, MT8321, MT8666, MT8667, MT8675, MT8765, MT8766, MT8768, MT8786,
MT8788, MT8789, MT8791, MT8797 Affected Software Versions Android 10.0, 11.0,
12.0







CVE CVE-2022-21770 Title Unix symbolic link (symlink) following in sound driver
Severity Medium Vulnerability Type ID CWE CWE-61 UNIX Symbolic Link (Symlink)
Following Description In sound driver, there is a possible information
disclosure due to symlink following. This could lead to local information
disclosure with System execution privileges needed. User interaction is not
needed for exploitation. Affected Chipsets MT6781, MT6877, MT6879, MT6893,
MT6895, MT6983, MT8791, MT8797, MT8798 Affected Software Versions Android 11.0,
12.0







CVE CVE-2022-21771 Title Concurrent execution using shared resource with
improper synchronization ('race condition') in GED driver Severity Medium
Vulnerability Type EoP CWE CWE-362 Concurrent Execution using Shared Resource
with Improper Synchronization ('Race Condition') Description In GED driver,
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. Affected Chipsets MT6580, MT6735,
MT6737, MT6739, MT6753, MT6761, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785,
MT6789, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889,
MT6893, MT6895, MT6983, MT8168, MT8365 Affected Software Versions Android 11.0,
12.0







CVE CVE-2022-21772 Title Concurrent execution using shared resource with
improper synchronization ('race condition') in TEEI driver Severity Medium
Vulnerability Type EoP CWE CWE-362 Concurrent Execution using Shared Resource
with Improper Synchronization ('Race Condition') Description In TEEI driver,
there is a possible type confusion 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. Affected Chipsets MT6761, MT6765,
MT6768, MT6771, MT6779, MT6833, MT6879, MT6885, MT6893, MT6895, MT6983, MT8185,
MT8765, MT8766, MT8768, MT8785, MT8786, MT8788, MT8791, MT8797 Affected Software
Versions Android 11.0, 12.0







CVE CVE-2022-21773 Title Concurrent execution using shared resource with
improper synchronization ('race condition') in TEEI driver Severity Medium
Vulnerability Type EoP CWE CWE-362 Concurrent Execution using Shared Resource
with Improper Synchronization ('Race Condition') Description In TEEI driver,
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. Affected Chipsets MT6580, MT6735,
MT6737, MT6739, MT6750, MT6750S, MT6755, MT6755S, MT6761, MT6762, MT6763,
MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6795, MT6797,
MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889,
MT6890, MT6891, MT6893 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21774 Title Concurrent execution using shared resource with
improper synchronization ('race condition') in TEEI driver Severity Medium
Vulnerability Type EoP CWE CWE-362 Concurrent Execution using Shared Resource
with Improper Synchronization ('Race Condition') Description In TEEI driver,
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. Affected Chipsets MT6761, MT6765,
MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6875, MT6877, MT6879,
MT6885, MT6893, MT6895, MT6983 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21775 Title Improper synchronization in sched driver Severity
Medium Vulnerability Type EoP CWE CWE-662 Improper Synchronization Description
In sched driver, there is a possible use after free due to improper locking.
This could lead to local escalation of privilege with System execution
privileges needed. User interaction is not needed for exploitation. Affected
Chipsets MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781,
MT6785, MT6789, MT6795, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6875,
MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT8167, MT8167S,
MT8168, MT8173, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8666, MT8675, MT8768,
MT8786, MT8788, MT8789, MT8791, MT8797 Affected Software Versions Android 11.0,
12.0







CVE CVE-2022-21776 Title Concurrent execution using shared resource with
improper synchronization ('race condition') in MDP Severity Medium Vulnerability
Type EoP CWE CWE-362 Concurrent Execution using Shared Resource with Improper
Synchronization ('Race Condition') Description In MDP, 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. Affected Chipsets MT6580, MT6739, MT6761, MT6765,
MT6768, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6873, MT6877,
MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT8163, MT8167, MT8167S, MT8168,
MT8173, MT8175, MT8183, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8666, MT8667,
MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8791, MT8797, MT8798 Affected
Software Versions Android 11.0, 12.0







CVE CVE-2022-21777 Title Improper access control in Autoboot Severity Medium
Vulnerability Type EoP CWE CWE-284 Improper Access Control Description In
Autoboot, there is a possible permission bypass due to a missing permission
check. This could lead to local escalation of privilege with no additional
execution privileges needed. User interaction is not needed for exploitation.
Affected Chipsets MT6580, MT6735, MT6739, MT6761, MT6765, MT6768, MT6771,
MT6779, MT6785, MT6833, MT6853, MT6873, MT6875, MT6877, MT6879, MT6885, MT6891,
MT6893, MT6895, MT6983, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8185, MT8321,
MT8362A, MT8365, MT8385, MT8666, MT8667, MT8675, MT8765, MT8766, MT8768, MT8786,
MT8788, MT8789, MT8791, MT8797 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21779 Title Improper input validation in WLAN driver Severity
Medium Vulnerability Type EoP CWE CWE-20 Improper Input Validation Description
In WLAN driver, 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. Affected
Chipsets MT6761, MT6779, MT6781, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883,
MT6885, MT6889, MT6893, MT6895, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185,
MT8362A, MT8365, MT8385, MT8667, MT8675, MT8696, MT8766, MT8768, MT8786, MT8788,
MT8789, MT8791, MT8797 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21780 Title Improper input validation in WLAN driver Severity
Medium Vulnerability Type EoP CWE CWE-20 Improper Input Validation Description
In WLAN driver, 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. Affected
Chipsets MT6761, MT6779, MT6781, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883,
MT6885, MT6889, MT6893, MT6895, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185,
MT8362A, MT8365, MT8385, MT8667, MT8675, MT8696, MT8766, MT8768, MT8786, MT8788,
MT8789, MT8791, MT8797 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21781 Title Improper input validation in WLAN driver Severity
Medium Vulnerability Type EoP CWE CWE-20 Improper Input Validation Description
In WLAN driver, 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. Affected
Chipsets MT6761, MT6779, MT6781, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883,
MT6885, MT6889, MT6893, MT6895, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185,
MT8362A, MT8365, MT8385, MT8667, MT8675, MT8696, MT8766, MT8768, MT8786, MT8788,
MT8789, MT8791, MT8797 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21782 Title Improper input validation in WLAN driver Severity
Medium Vulnerability Type EoP CWE CWE-20 Improper Input Validation Description
In WLAN driver, 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. Affected
Chipsets MT6761, MT6779, MT6781, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883,
MT6885, MT6889, MT6893, MT6895, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185,
MT8362A, MT8365, MT8385, MT8667, MT8675, MT8696, MT8766, MT8768, MT8786, MT8788,
MT8789, MT8791, MT8797 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21783 Title Improper input validation in WLAN driver Severity
Medium Vulnerability Type EoP CWE CWE-20 Improper Input Validation Description
In WLAN driver, 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. Affected
Chipsets MT6761, MT6779, MT6781, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883,
MT6885, MT6889, MT6893, MT6895, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185,
MT8362A, MT8365, MT8385, MT8667, MT8675, MT8696, MT8766, MT8768, MT8786, MT8788,
MT8789, MT8791, MT8797 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21784 Title Improper input validation in WLAN driver Severity
Medium Vulnerability Type EoP CWE CWE-20 Improper Input Validation Description
In WLAN driver, 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. Affected
Chipsets MT6761, MT6779, MT6781, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883,
MT6885, MT6889, MT6893, MT6895, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185,
MT8362A, MT8365, MT8385, MT8667, MT8675, MT8696, MT8766, MT8768, MT8786, MT8788,
MT8789, MT8791, MT8797 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21785 Title Improper input validation in WLAN driver Severity
Medium Vulnerability Type EoP CWE CWE-20 Improper Input Validation Description
In WLAN driver, 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. Affected
Chipsets MT6877, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A,
MT8365, MT8385, MT8667, MT8675, MT8695, MT8696, MT8766, MT8768, MT8786, MT8788,
MT8789, MT8791, MT8797 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21786 Title Incorrect type conversion or cast in audio DSP Severity
Medium Vulnerability Type EoP CWE CWE-704 Incorrect Type Conversion or Cast
Description In audio DSP, there is a possible memory corruption due to improper
casting. This could lead to local escalation of privilege with System execution
privileges needed. User interaction is not needed for exploitation. Affected
Chipsets MT6833, MT6853, MT6873, MT6877, MT6879, MT6885, MT6893, MT6895, MT6983,
MT8791, MT8797, MT8798 Affected Software Versions Android 11.0, 12.0







CVE CVE-2022-21787 Title Improper input validation in audio DSP Severity Medium
Vulnerability Type EoP CWE CWE-20 Improper Input Validation Description In audio
DSP, 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. Affected Chipsets
MT6833, MT6853, MT6873, MT6877, MT6879, MT6885, MT6893, MT6895, MT6983, MT8791,
MT8797, MT8798 Affected Software Versions Android 11.0, 12.0




VULNERABILITY TYPE DEFINITION



Abbreviation Definition RCE Remote Code Execution EoP Elevation of Privilege ID
Information Disclosure DoS Denial of Service N/A Classification not available




VERSIONS



Version Date Description 1.0 July 4, 2022 Bulletin published.




NOTES

Information above is generated only at the time of creation of this Security
Bulletin. The list of affected chipsets could be not complete. For any further
information, device OEMs can reach your MediaTek contact person if needed.

If you want to report a security vulnerability in MediaTek chipsets or products,
please go to Report Security Vulnerability page on MediaTek website.

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