CVE-2026-6042
Full vulnerability record from the local CVENow database.
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.
Severity
MEDIUM
CVSS score
4.8
(v4.0)
Vulnerability status
Deferred
Source identifier
Published
2026-04-10 09:16:25.450000
Last modified
2026-10-26 21:10:00.170000
View original CVE JSON
{
"id": "CVE-2026-6042",
"sourceIdentifier": "[email protected]",
"published": "2026-04-10T09:16:25.450",
"lastModified": "2026-10-26T21:10:00.170",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Una falla de seguridad ha sido descubierta en musl libc hasta la versión 1.2.6. Afecta a la función iconv del archivo src/locale/iconv.c del componente Decodificador GB18030 de 4 bytes. Realizar una manipulación resulta en una complejidad algorítmica ineficiente. El ataque debe ser iniciado desde una posición local. Para solucionar este problema, se recomienda desplegar un parche."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "musl",
"product": "libc",
"modules": [
"GB18030 4-byte Decoder"
],
"versions": [
{
"version": "1.2.0",
"status": "affected"
},
{
"version": "1.2.1",
"status": "affected"
},
{
"version": "1.2.2",
"status": "affected"
},
{
"version": "1.2.3",
"status": "affected"
},
{
"version": "1.2.4",
"status": "affected"
},
{
"version": "1.2.5",
"status": "affected"
},
{
"version": "1.2.6",
"status": "affected"
}
]
}
]
}
],
"metrics": {
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"source": "[email protected]",
"type": "Secondary",
"cvssData": {
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"vectorString": "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "LOW",
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"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"confidentialityRequirement": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"availabilityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED"
}
}
],
"cvssMetricV31": [
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"cvssMetricV2": [
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"cvssData": {
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"authentication": "SINGLE",
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"acInsufInfo": false,
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"ssvcV203": [
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"ssvcData": {
"timestamp": "2026-04-10T15:44:05.493056Z",
"id": "CVE-2026-6042",
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"description": [
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"references": [
{
"url": "https://vuldb.com/submit/796352",
"source": "[email protected]"
},
{
"url": "https://vuldb.com/vuln/356620",
"source": "[email protected]"
},
{
"url": "https://vuldb.com/vuln/356620/cti",
"source": "[email protected]"
},
{
"url": "https://www.openwall.com/lists/oss-security/2026/04/02/10",
"source": "[email protected]"
},
{
"url": "https://www.openwall.com/lists/oss-security/2026/04/03/2",
"source": "[email protected]"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/04/09/19",
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
]
}