CVE-2026-4426
Full vulnerability record from the local CVENow database.
Description
A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.
Severity
MEDIUM
CVSS score
6.5
(v3.1)
Vulnerability status
Modified
Source identifier
Published
2026-03-19 15:16:28.510000
Last modified
2026-11-05 21:18:50.970000
View original CVE JSON
{
"id": "CVE-2026-4426",
"sourceIdentifier": "[email protected]",
"published": "2026-03-19T15:16:28.510",
"lastModified": "2026-11-05T21:18:50.970",
"vulnStatus": "Modified",
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"value": "A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition."
},
{
"lang": "es",
"value": "Se encontró un defecto en libarchive. Existe una vulnerabilidad de comportamiento indefinido en la lógica de descompresión de zisofs, causada por una validación incorrecta de un campo ('pz_log2_bs') leído de las extensiones Rock Ridge de ISO9660. Un atacante remoto puede explotar esto al proporcionar un archivo ISO especialmente diseñado. Esto puede llevar a una asignación de memoria incorrecta y posibles caídas de la aplicación, lo que resulta en una condición de denegación de servicio (DoS)."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
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"vendor": "Red Hat",
"product": "Red Hat Hardened Images",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "libarchive-main",
"cpes": [
"cpe:/a:redhat:hummingbird:1"
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"metrics": {
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"source": "[email protected]",
"type": "Secondary",
"cvssData": {
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6
}
],
"ssvcV203": [
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"ssvcData": {
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"id": "CVE-2026-4426",
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"role": "CISA Coordinator",
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"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-1335"
}
]
}
],
"configurations": [
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"nodes": [
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"references": [
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"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-4426",
"source": "[email protected]",
"tags": [
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2449010",
"source": "[email protected]",
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{
"url": "https://github.com/libarchive/libarchive/pull/2897",
"source": "[email protected]",
"tags": [
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}