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TI-2026-16581 Aliases CVE-2026-20438GHSA-4c3g-mgjr-mchg

Time-of-check time-of-use race condition in MediaTek chipset

Priority LOW 29CWE-367Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

In MAE, there is a possible out of bounds write due to a race condition. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10431920; Issue ID: MSV-5835.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00065 0th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MediaTekMediaTek chipsetMT2718; MT6899; MT6991; MT8168; MT8169; MT8186; MT8188; MT8678; MT8695; MT8696; MT8793—No fix listedCNA
  • MediaTek chipset VendorMediaTek Affected MT2718; MT6899; MT6991; MT8168; MT8169; MT8186; MT8188; MT8678; MT8695; MT8696; MT8793 Fixed in — No fix listed CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:*15.0VulnerableGoogle
cpe:2.3:h:mediatek:mt2718:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
cpe:2.3:h:mediatek:mt6899:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
cpe:2.3:h:mediatek:mt6991:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
cpe:2.3:h:mediatek:mt8168:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
cpe:2.3:h:mediatek:mt8169:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
cpe:2.3:h:mediatek:mt8186:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
cpe:2.3:h:mediatek:mt8188:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
cpe:2.3:h:mediatek:mt8678:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
cpe:2.3:h:mediatek:mt8695:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
  • cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·Google
  • cpe:2.3:h:mediatek:mt2718:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
  • cpe:2.3:h:mediatek:mt6899:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
  • cpe:2.3:h:mediatek:mt6991:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
  • cpe:2.3:h:mediatek:mt8168:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
  • cpe:2.3:h:mediatek:mt8169:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
  • cpe:2.3:h:mediatek:mt8186:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
  • cpe:2.3:h:mediatek:mt8188:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
  • cpe:2.3:h:mediatek:mt8678:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
  • cpe:2.3:h:mediatek:mt8695:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:h:mediatek:mt8696:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
cpe:2.3:h:mediatek:mt8793:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
  • cpe:2.3:h:mediatek:mt8696:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
  • cpe:2.3:h:mediatek:mt8793:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20438
  2. 2026-10-03 Alias added: GHSA-4c3g-mgjr-mchg

References

Advisory 1

  • TI-2020-00067 Out-of-bounds write in Android KEVCVSS 3.1HIGH 7.8
  • TI-2024-13053 Improper input validation in MediaTek MT6890, MT7915, MT7916, MT7981, MT7986 CVSS 3.1CRITICAL 9.8
  • TI-2025-14725 Integer overflow in MediaTek MT6781, MT6789, MT6835, MT6855, MT6878, MT6879, MT6886… CVSS 3.1MEDIUM 6.5
  • TI-2024-13114 Memory corruption in MediaTek MT2735, MT2737, MT6833, MT6835, MT6835T, MT6853, MT6855… CVSS 3.1CRITICAL 9.8
  • TI-2022-14283 Command injection in MediaTek EN7528, EN7580 CVSS 3.1CRITICAL 9.8
  • TI-2021-11684 Command injection in MediaTek EN7528, EN7580 CVSS 3.1CRITICAL 9.8
See all 1133 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences