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.

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Local

Access Complexity Low

Authentication Single

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00013.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
musl libc affected
Version Status Constraints
1.2.0 affected —
1.2.1 affected —
1.2.2 affected —
1.2.3 affected —
1.2.4 affected —
1.2.5 affected —
1.2.6 affected —

No data.

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
http://www.openwall.com/lists/oss-security/2026/04/09/19 cve-icon
https://vuldb.com/submit/796352 cve-icon cve-icon
https://vuldb.com/vuln/356620 cve-icon cve-icon
https://vuldb.com/vuln/356620/cti cve-icon cve-icon
https://www.openwall.com/lists/oss-security/2026/04/02/10 cve-icon cve-icon
https://www.openwall.com/lists/oss-security/2026/04/03/2 cve-icon cve-icon
History

Fri, 10 Apr 2026 10:30:00 +0000

Type Values Removed Values Added
References

Fri, 10 Apr 2026 09:15:00 +0000

Type Values Removed Values Added
Description 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.
Title musl libc GB18030 4-byte Decoder iconv.c iconv algorithmic complexity
Weaknesses CWE-404
CWE-407
References
Metrics cvssV2_0

{'score': 1.7, 'vector': 'AV:L/AC:L/Au:S/C:N/I:N/A:P/E:ND/RL:OF/RC:C'}

cvssV3_0

{'score': 3.3, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C'}

cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C'}

cvssV4_0

{'score': 4.8, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-04-10T09:31:09.913Z

Reserved: 2026-04-09T17:34:11.256Z

Link: CVE-2026-6042

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-10T09:16:25.450

Modified: 2026-04-10T10:16:04.277

Link: CVE-2026-6042

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses