CVE-2026-20421 — Out-of-bounds Read in INC Mediatek Chipset

CWE-125 — Out-of-bounds Read3 documents3 sources
Severity
6.5MEDIUMNVD
EPSS
0.1%
top 78.32%
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 improper input validation. 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: MOLY01738293; Issue ID: MSV-5922.

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_chipset15 versions+14

🔴Vulnerability Details

2
GHSA
GHSA-522m-952c-996v: In Modem, there is a possible system crash due to improper input validation↗2026-02-02
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CVEList
CVE-2026-20421: In Modem, there is a possible system crash due to improper input validation↗2026-02-02
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CVE-2026-20421 — Out-of-bounds Read | cvebase