SB2026050486 - Multiple vulnerabilities in MediaTek chipsets (May 2026)

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Main Vulnerability Database SB2026050486

SB2026050486 - Multiple vulnerabilities in MediaTek chipsets (May 2026)

Published: May 4, 2026

Security Bulletin ID SB2026050486
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2026-20447)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to out-of-bounds read in geniezone when handling crafted local input. A local user can trigger the vulnerable condition to escalate privileges.


2) Improper Handling of Insufficient Permissions or Privileges (CVE-ID: CVE-2026-20448)

CWE-ID: CWE-280 - Improper Handling of Insufficient Permissions or Privileges

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper handling of insufficient permissions or privileges in geniezone when performing privileged operations. A local user can invoke the vulnerable functionality to escalate privileges.


3) Heap-based buffer overflow (CVE-ID: CVE-2026-20449)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to heap-based buffer overflow in modem when processing crafted local input. A local user can trigger the vulnerable condition to cause a denial of service.


4) Reachable assertion (CVE-ID: CVE-2026-20450)

CWE-ID: CWE-617 - Reachable Assertion

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to reachable assertion in modem when handling error conditions. A local user can trigger the vulnerable condition to cause a denial of service.


5) Type Confusion (CVE-ID: CVE-2026-20451)

CWE-ID: CWE-843 - Type confusion

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to type confusion in slbc when processing crafted local input. A local user can trigger an out-of-bounds write to cause a denial of service.


Remediation

Install update from vendor's website.

References