CVE-2026-20418 — Out-of-bounds Write in Google Matter

CWE-787 — Out-of-bounds Write3 documents3 sources
Severity
9.8CRITICALNVD
EPSS
0.1%
top 80.11%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Google MatterMediatek INC Mediatek Chipset
Timeline
PublishedFeb 2

Description

In Thread, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465153; Issue ID: MSV-4927.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages2 packages

▶NVDgoogle/matter1.4
▶CVEListV5mediatek_inc/mediatek_chipsetMT7931, MT7933+1

🔴Vulnerability Details

2
CVEList
CVE-2026-20418: In Thread, there is a possible out of bounds write due to a missing bounds check↗2026-02-02
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GHSA
GHSA-6chv-75w7-xwj6: In Thread, there is a possible out of bounds write due to a missing bounds check↗2026-02-02
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CVE-2026-20418 — Out-of-bounds Write in Google Matter | cvebase