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1 vulnerability by script3

CVE-2026-24783 (GCVE-0-2026-24783)

Vulnerability from cvelistv5 – Published: 2026-01-27 22:04 – Updated: 2026-01-27 22:04
VLAI?
Title
soroban-fixed-point-math has Incorrect Rounding and Overflow Handling in Signed Fixed-Point Math with Negatives
Summary
soroban-fixed-point-math is a fixed-point math library for Soroban smart contacts. In versions 1.3.0 and 1.4.0, the `mulDiv(x, y, z)` function incorrectly handled cases where both the intermediate product $x * y$ and the divisor $z$ were negative. The logic assumed that if the intermediate product was negative, the final result must also be negative, neglecting the sign of $z$. This resulted in rounding being applied in the wrong direction for cases where both $x * y$ and $z$ were negative. The functions most at risk are `fixed_div_floor` and `fixed_div_ceil`, as they often use non-constant numbers as the divisor $z$ in `mulDiv`. This error is present in all signed `FixedPoint` and `SorobanFixedPoint` implementations, including `i64`, `i128`, and `I256`. Versions 1.3.1 and 1.4.1 contain a patch. No known workarounds for this issue are available.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
script3 soroban-fixed-point-math Affected: = 1.4.0
Affected: = 1.3.0
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "soroban-fixed-point-math",
          "vendor": "script3",
          "versions": [
            {
              "status": "affected",
              "version": "= 1.4.0"
            },
            {
              "status": "affected",
              "version": "= 1.3.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "soroban-fixed-point-math is a fixed-point math library for Soroban smart contacts. In versions 1.3.0 and 1.4.0, the `mulDiv(x, y, z)` function incorrectly handled cases where both the intermediate product $x * y$ and the divisor $z$ were negative. The logic assumed that if the intermediate product was negative, the final result must also be negative, neglecting the sign of $z$. This resulted in rounding being applied in the wrong direction for cases where both $x * y$ and $z$ were negative. The functions most at risk are `fixed_div_floor` and `fixed_div_ceil`, as they often use non-constant numbers as the divisor $z$ in `mulDiv`.  This error is present in all signed `FixedPoint` and `SorobanFixedPoint` implementations, including `i64`, `i128`, and `I256`. Versions 1.3.1 and 1.4.1 contain a patch. No known workarounds for this issue are available."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-682",
              "description": "CWE-682: Incorrect Calculation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T22:04:18.006Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/script3/soroban-fixed-point-math/security/advisories/GHSA-x5m4-43jf-hh65",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/script3/soroban-fixed-point-math/security/advisories/GHSA-x5m4-43jf-hh65"
        },
        {
          "name": "https://github.com/script3/soroban-fixed-point-math/commit/c9233f7094198a49ed66a4d75786a8a3755c936a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/script3/soroban-fixed-point-math/commit/c9233f7094198a49ed66a4d75786a8a3755c936a"
        },
        {
          "name": "https://github.com/script3/soroban-fixed-point-math/releases/tag/v1.3.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/script3/soroban-fixed-point-math/releases/tag/v1.3.1"
        },
        {
          "name": "https://github.com/script3/soroban-fixed-point-math/releases/tag/v1.4.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/script3/soroban-fixed-point-math/releases/tag/v1.4.1"
        }
      ],
      "source": {
        "advisory": "GHSA-x5m4-43jf-hh65",
        "discovery": "UNKNOWN"
      },
      "title": "soroban-fixed-point-math has Incorrect Rounding and Overflow Handling in Signed Fixed-Point Math with Negatives"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-24783",
    "datePublished": "2026-01-27T22:04:18.006Z",
    "dateReserved": "2026-01-26T21:06:47.869Z",
    "dateUpdated": "2026-01-27T22:04:18.006Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}