CVE-2026-6042 MEDIUM

CVE-2026-6042: musl libc GB18030 4-byte Decoder iconv.c iconv algorithmic complexity

Vendor Musl
Product libc
Weakness CWE-407
Published April 10, 2026
Last update April 10, 2026

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X

What the vulnerability does

01Description

A security flaw has been discovered in musl libc up to 1.2.6. Affected is the function iconv of the file src/locale/iconv.c of the component GB18030 4-byte Decoder. Performing a manipulation results in inefficient algorithmic complexity. The attack must be initiated from a local position. To fix this issue, it is recommended to deploy a patch.

Key dates

02Disclosure timeline

April 10, 2026 CVE published
April 10, 2026 Record updated