CVE-2026-58082
Full vulnerability record from the local CVENow database.
Description
The ISO-2022 encoding module used a stack buffer sized to MB_LEN_MAX (6 bytes) for intermediate character output. Some ISO-2022 variants can require up to 10 bytes per character, in which case conversions can trigger a stack buffer overflow of up to four bytes. An application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules.
Severity
CRITICAL
CVSS score
9.8
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-08-19 08:17:12.370000
Last modified
2026-10-27 12:10:00.343000
View original CVE JSON
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"id": "CVE-2026-58082",
"sourceIdentifier": "[email protected]",
"published": "2026-08-19T08:17:12.370",
"lastModified": "2026-10-27T12:10:00.343",
"vulnStatus": "Analyzed",
"cveTags": [],
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{
"lang": "en",
"value": "The ISO-2022 encoding module used a stack buffer sized to MB_LEN_MAX (6 bytes) for intermediate character output. Some ISO-2022 variants can require up to 10 bytes per character, in which case conversions can trigger a stack buffer overflow of up to four bytes.\n\nAn application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules."
},
{
"lang": "es",
"value": "El módulo de codificación ISO-2022 utilizó un búfer de pila dimensionado a MB_LEN_MAX (6 bytes) para la salida de caracteres intermedios. Algunas variantes de ISO-2022 pueden requerir hasta 10 bytes por carácter, en cuyo caso las conversiones pueden desencadenar un desbordamiento de búfer de pila de hasta cuatro bytes.\n\nUna aplicación que utiliza iconv(3) para convertir entrada no confiable a o desde una de las codificaciones afectadas puede ser vulnerable a desbordamientos de búfer si utiliza uno de los módulos de codificación afectados."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "FreeBSD",
"product": "FreeBSD",
"defaultStatus": "unknown",
"modules": [
"iconv"
],
"versions": [
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{
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"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
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"id": "CVE-2026-58082",
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"type": "Secondary",
"description": [
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"references": [
{
"url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:49.iconv.asc",
"source": "[email protected]",
"tags": [
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]
}
]
}