FKIE_CVE-2026-0968

Vulnerability from fkie_nvd - Published: 2026-03-26 21:17 - Updated: 2026-04-03 20:06
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this by sending a malformed 'longname' field within an `SSH_FXP_NAME` message during a file listing operation. This missing null check can lead to reading beyond allocated memory on the heap. This can cause unexpected behavior or lead to a denial of service (DoS) due to application crashes.
References
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-0968Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2436982Third Party Advisory
secalert@redhat.comhttps://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/Release Notes
Impacted products
Vendor Product Version
libssh libssh *
redhat enterprise_linux 9.0
redhat enterprise_linux 10.0
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2366D711-FD0B-4A04-92BA-DE6DA0ED1BCF",
              "versionEndIncluding": "0.11.3",
              "vulnerable": true
            },
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              "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D",
              "vulnerable": true
            },
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              "matchCriteriaId": "D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C",
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this by sending a malformed \u0027longname\u0027 field within an `SSH_FXP_NAME` message during a file listing operation. This missing null check can lead to reading beyond allocated memory on the heap. This can cause unexpected behavior or lead to a denial of service (DoS) due to application crashes."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una falla en libssh en la que un servidor SFTP (Protocolo de Transferencia de Archivos SSH) malicioso puede explotar esto enviando un campo \u0027longname\u0027 malformado dentro de un mensaje \u0027SSH_FXP_NAME\u0027 durante una operaci\u00f3n de listado de archivos. Esta falta de verificaci\u00f3n de nulos puede llevar a leer m\u00e1s all\u00e1 de la memoria asignada en el heap. Esto puede causar un comportamiento inesperado o llevar a una denegaci\u00f3n de servicio (DoS) debido a fallos de la aplicaci\u00f3n."
    }
  ],
  "id": "CVE-2026-0968",
  "lastModified": "2026-04-03T20:06:16.037",
  "metrics": {
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 3.1,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L",
          "version": "3.0"
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        "exploitabilityScore": 1.6,
        "impactScore": 1.4,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
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    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-26T21:17:01.150",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2026-0968"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436982"
    },
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      "source": "secalert@redhat.com",
      "tags": [
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      "url": "https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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