Skip to main content

MediaTek vdec CVE-2026-20502

| EUVDEUVD-2026-72195 HIGH
Heap-based Buffer Overflow (CWE-122)
2026-09-07 MediaTek GHSA-56mv-f87w-qqrr
8.4
CVSS 3.1 · Vendor: MediaTek
Share

Severity by source

Vendor (MediaTek) PRIMARY
8.4 HIGH
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
8.4 HIGH

vdec is reachable by unprivileged app processes (PR:N), local access only (AV:L), with full kernel compromise potential but scope unchanged (S:U).

3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (MediaTek).

CVSS VectorVendor: MediaTek

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Sep 07, 2026 - 11:34 vuln.today
CVE Published
Sep 07, 2026 - 01:57 cve.org
HIGH 8.4
CVE Published
Sep 07, 2026 - 01:57 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

In vdec, 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. Patch ID: ALPS11262030; Issue ID: MSV-9196.

AnalysisAI

Local privilege escalation in MediaTek's vdec (video decoder) kernel driver affects more than 53 distinct chipset variants via a heap-based out-of-bounds write stemming from a missing bounds check (CWE-122). An unprivileged local process on any affected device can trigger the flaw to achieve full kernel-level read, write, and execute access without requiring any user interaction. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Persist
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to execute local code on the target device - specifically, an installed process capable of invoking the MediaTek vdec driver interface through media APIs. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 8.4 vector (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) captures the core risk accurately: local access required, low complexity, no privileges, no interaction, with full confidentiality, integrity, and availability impact - scope-unchanged prevents a Critical rating. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Device and OEM manufacturers should integrate and deploy the patch provided by MediaTek under Patch ID ALPS11262030, distributed through the September 2026 MediaTek Product Security Bulletin (https://www.mediatek.com/product-security-bulletin/September-2026). … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all MediaTek-based devices in your environment, prioritizing budget and mid-range models (2020-2026 production) used across shared or multi-user contexts, and document which devices enable unprivileged local shell access. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-20433 HIGH
8.8 Apr 07

Out-of-bounds write in MediaTek modem firmware enables remote privilege escalation when devices connect to attacker-cont

CVE-2026-20501 HIGH
8.4 Sep 07

Heap buffer overflow in the vdec (video decoder) kernel driver across 53+ MediaTek SoCs allows a local unprivileged atta

CVE-2026-20465 HIGH
8.1 Aug 03

Heap-based buffer overflow in the MediaTek WLAN AP driver enables an adjacent-network attacker to escalate privileges wi

CVE-2026-20432 HIGH
8.0 Apr 07

Out-of-bounds write in MediaTek modem chipset implementations allows remote privilege escalation when user equipment con

CVE-2026-20452 HIGH
8.0 Jun 01

Heap buffer overflow in the MediaTek WLAN access point driver allows adjacent-network attackers with low-privilege user

CVE-2026-20495 HIGH
7.8 Aug 03

Local privilege escalation in MediaTek's Bluetooth driver affects six Wi-Fi/Bluetooth combo chipsets (MT7902, MT7920, MT

CVE-2026-20455 HIGH
7.8 Jun 01

Local privilege escalation in MediaTek GenieZone (trusted execution environment) allows an attacker who has already gain

CVE-2026-20483 HIGH
7.7 Aug 03

Privilege escalation in MediaTek's Android Telephony component enables any locally-installed application - regardless of

CVE-2026-20479 HIGH
7.5 Aug 03

Out-of-bounds read in MediaTek modem firmware across 19 chipsets enables remote denial of service when a User Equipment

CVE-2026-20458 HIGH
7.5 Jul 01

Remote privilege escalation in the baseband modem firmware of dozens of MediaTek chipsets allows an attacker operating a

CVE-2026-20510 MEDIUM
6.7 Sep 07

Privilege escalation via a double-free memory corruption bug in camera middleware affects 17 MediaTek chipset variants,

CVE-2026-20509 MEDIUM
6.7 Sep 07

Local privilege escalation in MediaTek's Power HAL component allows a process operating with System-level privileges to

Share

CVE-2026-20502 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy