TI-2026-05303 Aliases CVE-2026-6042 GHSA-2qh3-3rmv-x43w

musl libc GB18030 4-byte Decoder iconv.c iconv algorithmic complexity

LOW 22CWE-404Published 2026-04-10 · Updated 2026-04-10

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-404.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0024 15th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
musl	libc	1.2.0; 1.2.1; 1.2.2; 1.2.3; 1.2.4; 1.2.5; 1.2.6	—	No fix listed	CNA

libc Vendormusl Affected 1.2.0; 1.2.1; 1.2.2; 1.2.3; 1.2.4; 1.2.5; 1.2.6 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-6042
2026-10-03 Alias added: GHSA-2qh3-3rmv-x43w

References

Patch 1

https://www.openwall.com/lists/oss-security/2026/04/03/2

Other 1

https://www.openwall.com/lists/oss-security/2026/04/02/10

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences