FKIE_CVE-2026-44983

Vulnerability from fkie_nvd - Published: 2026-05-26 22:16 - Updated: 2026-07-24 12:10
Severity
7.3 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Summary
smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1.
References
security-advisories@github.comhttps://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "smallbitvec",
          "vendor": "servo",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.0.1, \u003c 2.6.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1."
    },
    {
      "lang": "es",
      "value": "smallbitvec es un vector de bits redimensionable para Rust, optimizado para el tama\u00f1o. De 1.0.1 a 2.6.0, un desbordamiento de entero en el c\u00e1lculo interno de capacidad de smallbitvec puede conducir a una asignaci\u00f3n de memoria en el heap de tama\u00f1o insuficiente, lo que resulta en un desbordamiento de b\u00fafer en el heap \u00fanicamente a trav\u00e9s de APIs seguras. Esto permite la corrupci\u00f3n de memoria sin requerir c\u00f3digo inseguro por parte del llamador. Esta vulnerabilidad est\u00e1 corregida en 2.6.1."
    }
  ],
  "id": "CVE-2026-44983",
  "lastModified": "2026-07-24T12:10:00.210",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 4.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-44983",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-27T12:45:06.921929Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-26T22:16:43.440",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        },
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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