CVE-2026-43823

{
  "id": "CVE-2026-43823",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-23T15:17:05.613",
  "lastModified": "2026-10-24T13:10:00.147",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When initializing an RSA public key from DER or PEM bytes throws an error, the EVP_PKEY* is double-freed: first in the catch block, then in the deinit. This can lead to a crash on future memory allocations. This double-free manifests when BoringSSL cannot decode the public key from the bytes provided. This vulnerability is addressed in swift-crypto version 4.5.1."
    },
    {
      "lang": "es",
      "value": "Al inicializar una clave pública RSA a partir de bytes DER o PEM y se produce un error, el EVP_PKEY se libera dos veces: primero en el bloque catch y luego en el deinit. Esto puede provocar un fallo en futuras asignaciones de memoria. Esta doble liberación se manifiesta cuando BoringSSL no puede decodificar la clave pública a partir de los bytes proporcionados. Esta vulnerabilidad se aborda en la versión 4.5.1 de swift-crypto."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Apple",
          "product": "swift-crypto",
          "versions": [
            {
              "version": "0",
              "lessThan": "4.5.1",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-23T18:12:03.415654Z",
          "id": "CVE-2026-43823",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:apple:swift-crypto:*:*:*:*:*:swift:*:*",
              "versionStartIncluding": "3.2.0",
              "versionEndIncluding": "4.5.1",
              "matchCriteriaId": "94AEC1B4-0EDF-4CA0-8593-3F4E2ADA2C04"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/apple/swift-crypto/security/advisories/GHSA-8q93-f6xh-4f6f",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/apple/swift-crypto/security/advisories/GHSA-8q93-f6xh-4f6f",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}