Vulnerability-Lookup

CVE-2025-62492 (GCVE-0-2025-62492)

Vulnerability from cvelistv5 – Published: 2025-10-16 15:51 – Updated: 2025-10-16 18:02

Title

Heap out-of-bounds read in js_typed_array_indexOf in QuickJS

Summary

A vulnerability stemming from floating-point arithmetic precision errors exists in the QuickJS engine's implementation of TypedArray.prototype.indexOf() when a negative fromIndex argument is supplied. * The fromIndex argument (read as a double variable, $d$) is used to calculate the starting position for the search. * If d is negative, the index is calculated relative to the end of the array by adding the array's length (len) to d: $$d_{new} = d + \text{len}$$ * Due to the inherent limitations of floating-point arithmetic, if the negative value $d$ is extremely small (e.g., $-1 \times 10^{-20}$), the addition $d + \text{len}$ can result in a loss of precision, yielding an outcome that is exactly equal to $\text{len}$. * The result is then converted to an integer index $k$: $k = \text{len}$. * The search function proceeds to read array elements starting from index $k$. Since valid indices are $0$ to $\text{len}-1$, starting the read at index $\text{len}$ is one element past the end of the array. This allows an attacker to cause an Out-of-Bounds Read of one element immediately following the buffer. While the scope of this read is small (one element), it can potentially lead to Information Disclosure of adjacent memory contents, depending on the execution environment.

Severity

5.9 (Medium)


                        
                          CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-16 18:01 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

Google CNA under the Google root

CNA scorecard B 77/100 over 40 records in the last 180 days details

References

2 references

URL	Tags
https://bellard.org/quickjs/Changelog
https://issuetracker.google.com/434194797

Impacted products

1 product

Vendor	Product	Version	CPE status
QuickJS	QuickJS	Affected: 2025-04-26 , < 2025-09-13 (date)	guessed

Date Public

2025-07-24 22:00

Credits

Google Big Sleep

Show details on NVD website

JSON

To clipboard

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              "value": "A vulnerability stemming from floating-point arithmetic precision errors exists in the QuickJS engine\u0027s implementation of TypedArray.prototype.indexOf() when a negative fromIndex argument is supplied.\n\n  *  The fromIndex argument (read as a double variable, $d$) is used to calculate the starting position for the search.\n\n\n  *  If d is negative, the index is calculated relative to the end of the array by adding the array\u0027s length (len) to d:\n\n\n\n$$d_{new} = d + \\text{len}$$\n\n\n  *  Due to the inherent limitations of floating-point arithmetic, if the negative value $d$ is extremely small (e.g., $-1 \\times 10^{-20}$), the addition $d + \\text{len}$ can result in a loss of precision, yielding an outcome that is exactly equal to $\\text{len}$.\n\n\n  *  The result is then converted to an integer index $k$: $k = \\text{len}$.\n\n\n  *  The search function proceeds to read array elements starting from index $k$. Since valid indices are $0$ to $\\text{len}-1$, starting the read at index $\\text{len}$ is one element past the end of the array.\n\n\nThis allows an attacker to cause an Out-of-Bounds Read of one element immediately following the buffer. While the scope of this read is small (one element), it can potentially lead to Information Disclosure of adjacent memory contents, depending on the execution environment."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-175",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-175 Code Inclusion"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "HIGH",
                "attackRequirements": "PRESENT",
                "attackVector": "ADJACENT",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "LOW",
                "subConfidentialityImpact": "HIGH",
                "subIntegrityImpact": "LOW",
                "userInteraction": "PASSIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L",
                "version": "4.0",
                "vulnAvailabilityImpact": "LOW",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "LOW",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-125",
                  "description": "CWE-125 Out-of-bounds Read",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-10-16T15:51:34.445Z",
            "orgId": "14ed7db2-1595-443d-9d34-6215bf890778",
            "shortName": "Google"
          },
          "references": [
            {
              "url": "https://bellard.org/quickjs/Changelog"
            },
            {
              "url": "https://issuetracker.google.com/434194797"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Heap out-of-bounds read in js_typed_array_indexOf in QuickJS",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778",
        "assignerShortName": "Google",
        "cveId": "CVE-2025-62492",
        "datePublished": "2025-10-16T15:51:34.445Z",
        "dateReserved": "2025-10-15T08:47:41.878Z",
        "dateUpdated": "2025-10-16T18:02:02.585Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

FKIE_CVE-2025-62492

Vulnerability from fkie_nvd - Published: 2025-10-16 16:15 - Updated: 2026-10-19 16:10

Severity

6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	cve-coordination@google.com	https://bellard.org/quickjs/Changelog	Release Notes
	cve-coordination@google.com	https://issuetracker.google.com/434194797	Exploit, Issue Tracking

Impacted products

	Vendor	Product	Version
	quickjs_project	quickjs	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://bellard.org/quickjs/",
          "defaultStatus": "unaffected",
          "packageName": "js_typed_array_indexOf",
          "product": "QuickJS",
          "vendor": "QuickJS",
          "versions": [
            {
              "lessThan": "2025-09-13",
              "status": "affected",
              "version": "2025-04-26",
              "versionType": "date"
            }
          ]
        }
      ],
      "source": "cve-coordination@google.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:quickjs_project:quickjs:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AB84E2DC-74EA-4956-9521-C2B652B8E8C2",
              "versionEndExcluding": "2025-09-13",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability stemming from floating-point arithmetic precision errors exists in the QuickJS engine\u0027s implementation of TypedArray.prototype.indexOf() when a negative fromIndex argument is supplied.\n\n  *  The fromIndex argument (read as a double variable, $d$) is used to calculate the starting position for the search.\n\n\n  *  If d is negative, the index is calculated relative to the end of the array by adding the array\u0027s length (len) to d:\n\n\n\n$$d_{new} = d + \\text{len}$$\n\n\n  *  Due to the inherent limitations of floating-point arithmetic, if the negative value $d$ is extremely small (e.g., $-1 \\times 10^{-20}$), the addition $d + \\text{len}$ can result in a loss of precision, yielding an outcome that is exactly equal to $\\text{len}$.\n\n\n  *  The result is then converted to an integer index $k$: $k = \\text{len}$.\n\n\n  *  The search function proceeds to read array elements starting from index $k$. Since valid indices are $0$ to $\\text{len}-1$, starting the read at index $\\text{len}$ is one element past the end of the array.\n\n\nThis allows an attacker to cause an Out-of-Bounds Read of one element immediately following the buffer. While the scope of this read is small (one element), it can potentially lead to Information Disclosure of adjacent memory contents, depending on the execution environment."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad derivada de errores de precisi\u00f3n en aritm\u00e9tica de punto flotante existe en la implementaci\u00f3n del motor QuickJS de TypedArray.prototype.indexOf() cuando se proporciona un argumento fromIndex negativo.\n\n  *  El argumento fromIndex (le\u00eddo como una variable de tipo double, $d$) se utiliza para calcular la posici\u00f3n inicial para la b\u00fasqueda.\n\n\n  *  Si $d$ es negativo, el \u00edndice se calcula en relaci\u00f3n con el final del array sumando la longitud del array (len) a $d$:\n\n\n\n$$d_{new} = d + \\text{len}$$\n\n\n  *  Debido a las limitaciones inherentes de la aritm\u00e9tica de punto flotante, si el valor negativo $d$ es extremadamente peque\u00f1o (p. ej., $-1 \\times 10^{-20}$), la suma $d + \\text{len}$ puede resultar en una p\u00e9rdida de precisi\u00f3n, produciendo un resultado que es exactamente igual a $\\text{len}$.\n\n\n  *  El resultado se convierte entonces en un \u00edndice entero $k$: $k = \\text{len}$.\n\n\n  *  La funci\u00f3n de b\u00fasqueda procede a leer elementos del array comenzando desde el \u00edndice $k$. Dado que los \u00edndices v\u00e1lidos son de $0$ a $\\text{len}-1$, iniciar la lectura en el \u00edndice $\\text{len}$ es un elemento m\u00e1s all\u00e1 del final del array.\n\n\nEsto permite a un atacante causar una lectura fuera de l\u00edmites (Out-of-Bounds Read) de un elemento inmediatamente despu\u00e9s del b\u00fafer. Aunque el alcance de esta lectura es peque\u00f1o (un elemento), puede conducir potencialmente a la revelaci\u00f3n de informaci\u00f3n (Information Disclosure) de contenidos de memoria adyacentes, dependiendo del entorno de ejecuci\u00f3n."
    }
  ],
  "id": "CVE-2025-62492",
  "lastModified": "2026-10-19T16:10:00.260",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "PRESENT",
          "attackVector": "ADJACENT",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "LOW",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "LOW",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cve-coordination@google.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-62492",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-10-16T18:01:27.698649Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-10-16T16:15:39.620",
  "references": [
    {
      "source": "cve-coordination@google.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://bellard.org/quickjs/Changelog"
    },
    {
      "source": "cve-coordination@google.com",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ],
      "url": "https://issuetracker.google.com/434194797"
    }
  ],
  "sourceIdentifier": "cve-coordination@google.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "cve-coordination@google.com",
      "type": "Secondary"
    }
  ]
}

GHSA-7X74-J54Q-CMV6

Vulnerability from github – Published: 2025-10-16 18:30 – Updated: 2025-10-30 18:31

Details

The fromIndex argument (read as a double variable, $d$) is used to calculate the starting position for the search.
If d is negative, the index is calculated relative to the end of the array by adding the array's length (len) to d:

$$d_{new} = d + \text{len}$$

Due to the inherent limitations of floating-point arithmetic, if the negative value $d$ is extremely small (e.g., $-1 \times 10^{-20}$), the addition $d + \text{len}$ can result in a loss of precision, yielding an outcome that is exactly equal to $\text{len}$.
The result is then converted to an integer index $k$: $k = \text{len}$.
The search function proceeds to read array elements starting from index $k$. Since valid indices are $0$ to $\text{len}-1$, starting the read at index $\text{len}$ is one element past the end of the array.

This allows an attacker to cause an Out-of-Bounds Read of one element immediately following the buffer. While the scope of this read is small (one element), it can potentially lead to Information Disclosure of adjacent memory contents, depending on the execution environment.

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

5.9 (Medium)


                  
                    CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-62492"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-16T16:15:39Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability stemming from floating-point arithmetic precision errors exists in the QuickJS engine\u0027s implementation of TypedArray.prototype.indexOf() when a negative fromIndex argument is supplied.\n\n  *  The fromIndex argument (read as a double variable, $d$) is used to calculate the starting position for the search.\n\n\n  *  If d is negative, the index is calculated relative to the end of the array by adding the array\u0027s length (len) to d:\n\n\n\n$$d_{new} = d + \\text{len}$$\n\n\n  *  Due to the inherent limitations of floating-point arithmetic, if the negative value $d$ is extremely small (e.g., $-1 \\times 10^{-20}$), the addition $d + \\text{len}$ can result in a loss of precision, yielding an outcome that is exactly equal to $\\text{len}$.\n\n\n  *  The result is then converted to an integer index $k$: $k = \\text{len}$.\n\n\n  *  The search function proceeds to read array elements starting from index $k$. Since valid indices are $0$ to $\\text{len}-1$, starting the read at index $\\text{len}$ is one element past the end of the array.\n\n\nThis allows an attacker to cause an Out-of-Bounds Read of one element immediately following the buffer. While the scope of this read is small (one element), it can potentially lead to Information Disclosure of adjacent memory contents, depending on the execution environment.",
  "id": "GHSA-7x74-j54q-cmv6",
  "modified": "2025-10-30T18:31:07Z",
  "published": "2025-10-16T18:30:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-62492"
    },
    {
      "type": "WEB",
      "url": "https://bellard.org/quickjs/Changelog"
    },
    {
      "type": "WEB",
      "url": "https://issuetracker.google.com/434194797"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

UBUNTU-CVE-2025-62492 (CVE-2025-62492)

Vulnerability from osv_ubuntu – Published: 2025-10-16 16:15 – Updated: 2026-10-17 09:36 – Source website

Details

Severity

5.9 (Medium)


                    
                      CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L

6.5 (Medium)


                    
                      CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2025-62492	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-62492	REPORT
	https://issuetracker.google.com/434194797	REPORT
	https://bellard.org/quickjs/Changelog	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libquickjs",
            "binary_version": "2021.03.27-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "quickjs",
            "binary_version": "2021.03.27-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "quickjs",
        "purl": "pkg:deb/ubuntu/quickjs@2021.03.27-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2021.03.27-1",
        "2021.03.27-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libquickjs",
            "binary_version": "2025.04.26-1"
          },
          {
            "binary_name": "quickjs",
            "binary_version": "2025.04.26-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "quickjs",
        "purl": "pkg:deb/ubuntu/quickjs@2025.04.26-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2024.01.13-5",
        "2025.04.26-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libquickjs",
            "binary_version": "2025.04.26-1build1"
          },
          {
            "binary_name": "quickjs",
            "binary_version": "2025.04.26-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "quickjs",
        "purl": "pkg:deb/ubuntu/quickjs@2025.04.26-1build1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2025.04.26-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libquickjs",
            "binary_version": "2025.04.26-1build1"
          },
          {
            "binary_name": "quickjs",
            "binary_version": "2025.04.26-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "quickjs",
        "purl": "pkg:deb/ubuntu/quickjs@2025.04.26-1build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2025.04.26-1",
        "2025.04.26-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "A vulnerability stemming from floating-point arithmetic precision errors exists in the QuickJS engine\u0027s implementation of TypedArray.prototype.indexOf() when a negative fromIndex argument is supplied.   *  The fromIndex argument (read as a double variable, $d$) is used to calculate the starting position for the search.   *  If d is negative, the index is calculated relative to the end of the array by adding the array\u0027s length (len) to d: $$d_{new} = d + \\text{len}$$   *  Due to the inherent limitations of floating-point arithmetic, if the negative value $d$ is extremely small (e.g., $-1 \\times 10^{-20}$), the addition $d + \\text{len}$ can result in a loss of precision, yielding an outcome that is exactly equal to $\\text{len}$.   *  The result is then converted to an integer index $k$: $k = \\text{len}$.   *  The search function proceeds to read array elements starting from index $k$. Since valid indices are $0$ to $\\text{len}-1$, starting the read at index $\\text{len}$ is one element past the end of the array. This allows an attacker to cause an Out-of-Bounds Read of one element immediately following the buffer. While the scope of this read is small (one element), it can potentially lead to Information Disclosure of adjacent memory contents, depending on the execution environment.",
  "id": "UBUNTU-CVE-2025-62492",
  "modified": "2026-10-17T09:36:23Z",
  "published": "2025-10-16T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-62492"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-62492"
    },
    {
      "type": "REPORT",
      "url": "https://issuetracker.google.com/434194797"
    },
    {
      "type": "REPORT",
      "url": "https://bellard.org/quickjs/Changelog"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-62492"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2025-62492 (GCVE-0-2025-62492)

FKIE_CVE-2025-62492

GHSA-7X74-J54Q-CMV6

UBUNTU-CVE-2025-62492 (CVE-2025-62492)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour