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    August 2022
    Product Security Bulletin

    Published 2022-08-01

    The MediaTek Product Security Bulletin contains details of security vulnerabilities affecting MediaTek Smartphone, Tablet, AIoT, Smart display, Smart platform, OTT and NBIoT 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 NBIoT 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-2022-26437
    Medium CVE-2022-21789, CVE-2022-21790, CVE-2022-21791, CVE-2022-21792, CVE-2022-26426, CVE-2022-26427, CVE-2022-26428, CVE-2022-26429, CVE-2022-21788, CVE-2022-26430, CVE-2022-26431, CVE-2022-26432, CVE-2022-26433, CVE-2022-26434, CVE-2022-26435, CVE-2022-26436, CVE-2022-26438, CVE-2022-26439, CVE-2022-26440, CVE-2022-26441, CVE-2022-26442, CVE-2022-26443, CVE-2022-26444, CVE-2022-26445

    Details

    CVE CVE-2022-26437
    Title Out-of-bounds write in httpclient
    Severity High
    Vulnerability Type EoP
    CWE CWE-787 Out-of-bounds Write
    Description In httpclient, there is a possible out of bounds write due to uninitialized data. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT2621, MT2625
    Affected Software Versions NBIOT SDK V2.8.1

    CVE CVE-2022-21789
    Title Concurrent execution using shared resource with improper synchronization ('race condition') in audio ipi
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
    Description In audio ipi, there is a possible memory corruption 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 MT6779, MT6781, MT6785, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT6985, MT8791, MT8797, MT8798
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21790
    Title Improper input validation in camera isp
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In camera isp, 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 MT6833, MT6853, MT6873, MT6877, MT6893
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21791
    Title Improper input validation in camera isp
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In camera isp, 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 MT6833, MT6853, MT6873, MT6877, MT6885, MT6893
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21792
    Title Improper input validation in camera isp
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In camera isp, 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, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6893
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26426
    Title Improper input validation in camera isp
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In camera isp, 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, MT6893, MT8167, MT8167S, MT8168, MT8175, MT8185, MT8362A, MT8365, MT8385, MT8666, MT8675, MT8765, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26427
    Title Improper input validation in camera isp
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In camera isp, 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, MT6893
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26428
    Title Concurrent execution using shared resource with improper synchronization ('race condition') in video codec
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
    Description In video codec, there is a possible memory corruption 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 MT6739, MT6761, MT6765, MT6771, MT8163, MT8167, MT8173, MT8183, MT8362A, MT8385, MT8695
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-26429
    Title Improper access control in cta
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-284 Improper Access Control
    Description In cta, there is a possible way to write permission usage records of an app 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, MT6757, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8168, MT8173, MT8185, MT8321, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21788
    Title Detection of error condition without action in scp
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-390 Detection of Error Condition Without Action
    Description In scp, there is a possible undefined behavior 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 MT6879, MT6895, MT6983
    Affected Software Versions Android 12.0

    CVE CVE-2022-26430
    Title Access of resource using incompatible type ('type confusion') in mailbox
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
    Description In mailbox, there is a possible out of bounds write due to type confusion. 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, MT8185, MT8321, MT8385, MT8532, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0 or Yocto 3.1, 3.3

    CVE CVE-2022-26431
    Title Improper input validation in mailbox
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In mailbox, 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, MT8185, MT8321, MT8385, MT8532, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0 or Yocto 3.1, 3.3

    CVE CVE-2022-26432
    Title Improper input validation in mailbox
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In mailbox, 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, MT8185, MT8321, MT8385, MT8532, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0 or Yocto 3.1, 3.3

    CVE CVE-2022-26433
    Title Access of resource using incompatible type ('type confusion') in mailbox
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
    Description In mailbox, there is a possible out of bounds write due to type confusion. 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, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8532, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0 or Yocto 3.1, 3.3

    CVE CVE-2022-26434
    Title Improper input validation in mailbox
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In mailbox, 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, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8532, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0 or Yocto 3.1, 3.3

    CVE CVE-2022-26435
    Title Access of resource using incompatible type ('type confusion') in mailbox
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
    Description In mailbox, there is a possible out of bounds write due to type confusion. 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, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8532, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0 or Yocto 3.1, 3.3

    CVE CVE-2022-26436
    Title Improper input validation in emi mpu
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In emi mpu, 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 MT6855, MT6879, MT6895, MT6983
    Affected Software Versions Android 12.0

    CVE CVE-2022-26438
    Title Improper input validation in wifi driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In wifi 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 MT7603, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915, MT7916, MT7986, MT8981
    Affected Software Versions 7.6.2.3

    CVE CVE-2022-26439
    Title Improper input validation in wifi driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In wifi 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 MT7603, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915, MT7916, MT7986, MT8981
    Affected Software Versions 7.6.2.3

    CVE CVE-2022-26440
    Title Improper input validation in wifi driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In wifi 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 MT7603, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915, MT7916, MT7986, MT8981
    Affected Software Versions 7.6.2.3

    CVE CVE-2022-26441
    Title Improper input validation in wifi driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In wifi 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 MT7603, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915, MT7916, MT7986, MT8981
    Affected Software Versions 7.6.2.3

    CVE CVE-2022-26442
    Title Improper input validation in wifi driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In wifi 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 MT7603, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915, MT7916, MT7986, MT8981
    Affected Software Versions 7.6.2.3

    CVE CVE-2022-26443
    Title Improper input validation in wifi driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In wifi 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 MT7603, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915, MT7916, MT7986, MT8981
    Affected Software Versions 7.6.2.3

    CVE CVE-2022-26444
    Title Improper input validation in wifi driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In wifi 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 MT7603, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915, MT7916, MT7986, MT8981
    Affected Software Versions 7.6.2.3

    CVE CVE-2022-26445
    Title Improper input validation in wifi driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In wifi 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 MT7603, MT7610, MT7612, MT7613, MT7615, MT7620, MT7622, MT7628, MT7629, MT7915, MT7916, MT7986, MT8981
    Affected Software Versions 7.6.2.3

    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 August 1, 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.