CVE-2026-20403 — Out-of-bounds Write in INC Mediatek Chipset

CWE-787 — Out-of-bounds Write3 documents3 sources
Severity
6.5MEDIUMNVD
EPSS
0.1%
top 76.07%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Mediatek INC Mediatek Chipset
Timeline
PublishedFeb 2

Description

In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01689254 (Note: For N15 and NR16) / MOLY01689259 (Note: For NR17 and NR17R); Issue ID: MSV-4843.

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages1 packages

▶CVEListV5mediatek_inc/mediatek_chipset42 versions+41

🔴Vulnerability Details

2
GHSA
GHSA-2rrf-rvr2-f97v: In Modem, there is a possible system crash due to a missing bounds check↗2026-02-02
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CVEList
CVE-2026-20403: In Modem, there is a possible system crash due to a missing bounds check↗2026-02-02
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CVE-2026-20403 — Out-of-bounds Write | cvebase