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2 vulnerabilities by ndsev

CVE-2026-33666 (GCVE-0-2026-33666)

Vulnerability from cvelistv5 – Published: 2026-04-24 18:21 – Updated: 2026-04-24 18:21
VLAI?
Title
Zserio: Integer Overflow in BitStreamReader on 32-bit platforms
Summary
Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, in BitStreamReader.h readBytes() / readString(), the setBitPosition() bounds check receives the overflowed value and is completely bypassed. The code then reads len bytes (512 MB) from a buffer that is only a few bytes long, causing a segmentation fault. This vulnerability is fixed in 2.18.1.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
Vendor Product Version
ndsev zserio Affected: <= 2.15.0
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "zserio",
          "vendor": "ndsev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.15.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, in BitStreamReader.h readBytes() / readString(), the setBitPosition() bounds check receives the overflowed value and is completely bypassed. The code then reads len bytes (512 MB) from a buffer that is only a few bytes long, causing a segmentation fault. This vulnerability is fixed in 2.18.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-190",
              "description": "CWE-190: Integer Overflow or Wraparound",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-24T18:21:11.265Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwj",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwj"
        }
      ],
      "source": {
        "advisory": "GHSA-fjwv-6wcr-vqwj",
        "discovery": "UNKNOWN"
      },
      "title": "Zserio: Integer Overflow in BitStreamReader on 32-bit platforms"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33666",
    "datePublished": "2026-04-24T18:21:11.265Z",
    "dateReserved": "2026-03-23T15:23:42.220Z",
    "dateUpdated": "2026-04-24T18:21:11.265Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-33524 (GCVE-0-2026-33524)

Vulnerability from cvelistv5 – Published: 2026-04-24 18:18 – Updated: 2026-04-24 18:18
VLAI?
Title
Zserio: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization
Summary
Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, a crafted payload as small as 4-5 bytes can force memory allocations of up to 16 GB, crashing any process with an OOM error (Denial of Service). This vulnerability is fixed in 2.18.1.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
Impacted products
Vendor Product Version
ndsev zserio Affected: < 2.18.1
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "zserio",
          "vendor": "ndsev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.18.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, a crafted payload as small as 4-5 bytes can force memory allocations of up to 16 GB, crashing any process with an OOM error (Denial of Service). This vulnerability is fixed in 2.18.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-789",
              "description": "CWE-789: Memory Allocation with Excessive Size Value",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-24T18:18:02.913Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ndsev/zserio/security/advisories/GHSA-cwq5-8pvq-j65j",
          "tags": [
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          ],
          "url": "https://github.com/ndsev/zserio/security/advisories/GHSA-cwq5-8pvq-j65j"
        }
      ],
      "source": {
        "advisory": "GHSA-cwq5-8pvq-j65j",
        "discovery": "UNKNOWN"
      },
      "title": "Zserio: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33524",
    "datePublished": "2026-04-24T18:18:02.913Z",
    "dateReserved": "2026-03-20T18:05:11.829Z",
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  },
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}