Vulnerability in Musl Libc
CVE-2026-6042
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.
EPSS: 0.002 (14.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Musl Libc — versions 1.2.0, 1.2.1, 1.2.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (related)
- cna@vuldb.com (patch)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-6042?
- CVE-2026-6042 is a low-severity vulnerability in Musl Libc, classified under Improper Resource Shutdown or Release. CVSS score: 3.3/10. Published 2026-04-10.
- How severe is CVE-2026-6042?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2026-6042 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.