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    September 2022
    Product Security Bulletin

    Published 2022-09-05

    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).

    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-2022-26447
    Medium CVE-2022-26448, CVE-2022-26449, CVE-2022-26450, CVE-2022-26451, CVE-2022-26453, CVE-2022-26454, CVE-2022-26455, CVE-2022-26456, CVE-2022-26457, CVE-2022-26458, CVE-2022-26459, CVE-2022-26460, CVE-2022-26461, CVE-2022-26462, CVE-2022-26463, CVE-2022-26464, CVE-2022-26465, CVE-2022-26466, CVE-2022-26467, CVE-2022-26468, CVE-2022-26469, CVE-2022-26470

    Details

    CVE CVE-2022-26447
    Title Improper input validation in BT firmware
    Severity High
    Vulnerability Type RCE
    CWE CWE-20 Improper Input Validation
    Description In BT firmware, there is a possible out of bounds write due to a missing bounds check. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6735, MT6737, MT6739, MT6750S, MT6753, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6763, MT6771, MT8163, MT8167, MT8167S, MT8173, MT8183, MT8321, MT8362A, MT8385, MT8518, MT8532, MT8765, MT8788
    Affected Software Versions Android 10.0, 11.0, 12.0 and Yocto 3.1

    CVE CVE-2022-26448
    Title Improper input validation in apusys
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In apusys, 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 MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26449
    Title Improper input validation in apusys
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In apusys, 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 MT6879, MT6895, MT6983
    Affected Software Versions Android 12.0

    CVE CVE-2022-26450
    Title Concurrent execution using shared resource with improper synchronization ('race condition') in apusys
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
    Description In apusys, 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 MT6879, MT6895, MT6983
    Affected Software Versions Android 12.0

    CVE CVE-2022-26451
    Title Improper synchronization in ged
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-662 Improper Synchronization
    Description In ged, 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 MT6789, MT6855, MT6879, MT6895, MT6983, MT8168, MT8365
    Affected Software Versions Android 12.0

    CVE CVE-2022-26453
    Title Use after free in teei
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-416 Use After Free
    Description In teei, there is a possible memory corruption due to a use after free. 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-2022-26454
    Title Integer overflow or wraparound in teei
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-190 Integer Overflow or Wraparound
    Description In teei, there is a possible memory corruption due to an integer overflow. 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-2022-26455
    Title Improper handling of exceptional conditions in gz
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-755 Improper Handling of Exceptional Conditions
    Description In gz, there is a possible memory corruption due to incorrect error handling. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6789, MT6855, MT6879, MT6895, MT6983
    Affected Software Versions Android 12.0

    CVE CVE-2022-26456
    Title Unix symbolic link (symlink) following in vow
    Severity Medium
    Vulnerability Type ID
    CWE CWE-61 UNIX Symbolic Link (Symlink) Following
    Description In vow, there is a possible information disclosure due to a symbolic link following. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6769, MT6781, MT6785, MT6789, MT6833, MT6853, MT6855, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT6983, MT8185, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0

    CVE CVE-2022-26457
    Title Improper input validation in vow
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In vow, 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 MT6769, MT6781, MT6785, MT6833, MT6855, MT6877, MT6879, MT6893, MT6983, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26458
    Title Improper input validation in vow
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In vow, 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 MT6853, MT6855, MT6873, MT6877, MT6883, MT6885, MT6893, MT6895, MT6983, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26459
    Title Integer overflow or wraparound in vow
    Severity Medium
    Vulnerability Type ID
    CWE CWE-190 Integer Overflow or Wraparound
    Description In vow, there is a possible out of bounds read due to an integer overflow. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6833, MT6853, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26460
    Title Improper input validation in vow
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In vow, there is a possible out of bounds write due to an incorrect 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, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26461
    Title Undefined behavior for input to api in vow
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-475 Undefined Behavior for Input to API
    Description In vow, there is a possible undefined behavior due to an API misuse. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6833, MT6853, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26462
    Title Improper input validation in vow
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In vow, there is a possible out of bounds read due to an incorrect bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6833, MT6853, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26463
    Title Improper input validation in vow
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In vow, there is a possible out of bounds read due to an incorrect bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6833, MT6853, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26464
    Title Improper input validation in vow
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In vow, there is a possible out of bounds write due to an incorrect 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, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26465
    Title Improper input validation in audio ipi
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In audio ipi, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6779, MT6781, MT6785, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8512A, MT8518, MT8791, MT8797, MT8798
    Affected Software Versions Android 11.0, 12.0 and Yocto 3.1

    CVE CVE-2022-26466
    Title Integer overflow or wraparound in audio ipi
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-190 Integer Overflow or Wraparound
    Description In audio ipi, there is a possible out of bounds write due to an integer overflow. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6779, MT6781, MT6785, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8512A, MT8518, MT8519_M1V1, MT8519_P1V1, MT8791, MT8797, MT8798
    Affected Software Versions Android 11.0, 12.0 and Yocto 3.1

    CVE CVE-2022-26467
    Title Improper input validation in rpmb
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In rpmb, there is a possible out of bounds write due to an incorrect 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, MT6853T, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8168, MT8183, MT8321, MT8365, MT8385, MT8666, MT8675, MT8765, MT8768, MT8786, MT8788, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26468
    Title Improper input validation in preloader (usb)
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In preloader (usb), there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, for an attacker who has physical access to the device, with no additional execution privileges needed. User interaction is needed for exploitation.
    Affected Chipsets MT6735, MT6739, MT6761, MT6763, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6855, MT6873, MT6877, MT6879, MT6885, MT6893, MT6895, MT6983, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8183, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8666, MT8667, MT8675, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26469
    Title Use of externally-controlled input to select classes or code ('unsafe reflection') in MtkEmail
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
    Description In MtkEmail, there is a possible escalation of privilege due to fragment injection. 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, MT6737, MT6739, MT6761, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6895, MT6983, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26470
    Title Improper input validation in aie
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In aie, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6879, MT6895, MT6983, MT8321, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789
    Affected Software Versions Android 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 September 5, 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.

    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.