GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2025-12818 (GCVE-0-2025-12818)

Vulnerability from cvelistv5 – Published: 2025-11-13 13:00 – Updated: 2025-11-13 13:59
VLAI
Title
PostgreSQL libpq undersizes allocations, via integer wraparound
Summary
Integer wraparound in multiple PostgreSQL libpq client library functions allows an application input provider or network peer to cause libpq to undersize an allocation and write out-of-bounds by hundreds of megabytes. This results in a segmentation fault for the application using libpq. Versions before PostgreSQL 18.1, 17.7, 16.11, 15.15, 14.20, and 13.23 are affected.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-13 13:59 UTC
CWE
  • CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
Vendor Product Version CPE status
n/a PostgreSQL Affected: 18 , < 18.1 (rpm)
Affected: 17 , < 17.7 (rpm)
Affected: 16 , < 16.11 (rpm)
Affected: 15 , < 15.15 (rpm)
Affected: 14 , < 14.20 (rpm)
Affected: 0 , < 13.23 (rpm)
Credits
The PostgreSQL project thanks Aleksey Solovev (Positive Technologies) for reporting this problem.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-12818",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-11-13T13:59:26.597610Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-11-13T13:59:33.436Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "PostgreSQL",
          "vendor": "n/a",
          "versions": [
            {
              "lessThan": "18.1",
              "status": "affected",
              "version": "18",
              "versionType": "rpm"
            },
            {
              "lessThan": "17.7",
              "status": "affected",
              "version": "17",
              "versionType": "rpm"
            },
            {
              "lessThan": "16.11",
              "status": "affected",
              "version": "16",
              "versionType": "rpm"
            },
            {
              "lessThan": "15.15",
              "status": "affected",
              "version": "15",
              "versionType": "rpm"
            },
            {
              "lessThan": "14.20",
              "status": "affected",
              "version": "14",
              "versionType": "rpm"
            },
            {
              "lessThan": "13.23",
              "status": "affected",
              "version": "0",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "The PostgreSQL project thanks Aleksey Solovev (Positive Technologies) for reporting this problem."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Integer wraparound in multiple PostgreSQL libpq client library functions allows an application input provider or network peer to cause libpq to undersize an allocation and write out-of-bounds by hundreds of megabytes.  This results in a segmentation fault for the application using libpq.  Versions before PostgreSQL 18.1, 17.7, 16.11, 15.15, 14.20, and 13.23 are affected."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-190",
              "description": "Integer Overflow or Wraparound",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-13T13:00:12.911Z",
        "orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
        "shortName": "PostgreSQL"
      },
      "references": [
        {
          "url": "https://www.postgresql.org/support/security/CVE-2025-12818/"
        }
      ],
      "title": "PostgreSQL libpq undersizes allocations, via integer wraparound"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
    "assignerShortName": "PostgreSQL",
    "cveId": "CVE-2025-12818",
    "datePublished": "2025-11-13T13:00:12.911Z",
    "dateReserved": "2025-11-06T17:22:32.130Z",
    "dateUpdated": "2025-11-13T13:59:33.436Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-12818",
      "date": "2026-09-09",
      "epss": "0.0034",
      "percentile": "0.26999"
    },
    "microsoft_vex": {
      "current_release_date": "2026-03-04T14:36:37.000Z",
      "cve": "CVE-2025-12818",
      "id": "msrc_CVE-2025-12818",
      "initial_release_date": "2025-11-02T00:00:00.000Z",
      "product_status:fixed": "4",
      "product_status:known_affected": "6",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "PostgreSQL libpq undersizes allocations, via integer wraparound",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-12818.json",
      "version": "4"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-12818\",\"sourceIdentifier\":\"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007\",\"published\":\"2025-11-13T13:15:45.313\",\"lastModified\":\"2026-06-17T08:33:00.083\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Integer wraparound in multiple PostgreSQL libpq client library functions allows an application input provider or network peer to cause libpq to undersize an allocation and write out-of-bounds by hundreds of megabytes.  This results in a segmentation fault for the application using libpq.  Versions before PostgreSQL 18.1, 17.7, 16.11, 15.15, 14.20, and 13.23 are affected.\"}],\"affected\":[{\"source\":\"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007\",\"affectedData\":[{\"vendor\":\"n/a\",\"product\":\"PostgreSQL\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"18\",\"lessThan\":\"18.1\",\"versionType\":\"rpm\",\"status\":\"affected\"},{\"version\":\"17\",\"lessThan\":\"17.7\",\"versionType\":\"rpm\",\"status\":\"affected\"},{\"version\":\"16\",\"lessThan\":\"16.11\",\"versionType\":\"rpm\",\"status\":\"affected\"},{\"version\":\"15\",\"lessThan\":\"15.15\",\"versionType\":\"rpm\",\"status\":\"affected\"},{\"version\":\"14\",\"lessThan\":\"14.20\",\"versionType\":\"rpm\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"13.23\",\"versionType\":\"rpm\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-11-13T13:59:26.597610Z\",\"id\":\"CVE-2025-12818\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-190\"}]}],\"references\":[{\"url\":\"https://www.postgresql.org/support/security/CVE-2025-12818/\",\"source\":\"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-08T14:47:53+00:00",
      "cve": "CVE-2025-12818",
      "id": "CVE-2025-12818",
      "initial_release_date": "2025-11-13T13:00:12.911000+00:00",
      "product_status:fixed": "3265",
      "product_status:known_affected": "11",
      "product_status:known_not_affected": "40",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "postgresql: libpq: libpq undersizes allocations, via integer wraparound",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-12818.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-12818\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-11-13T13:59:26.597610Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-11-13T13:59:31.006Z\"}}], \"cna\": {\"title\": \"PostgreSQL libpq undersizes allocations, via integer wraparound\", \"credits\": [{\"lang\": \"en\", \"value\": \"The PostgreSQL project thanks Aleksey Solovev (Positive Technologies) for reporting this problem.\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 5.9, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H\"}}], \"affected\": [{\"vendor\": \"n/a\", \"product\": \"PostgreSQL\", \"versions\": [{\"status\": \"affected\", \"version\": \"18\", \"lessThan\": \"18.1\", \"versionType\": \"rpm\"}, {\"status\": \"affected\", \"version\": \"17\", \"lessThan\": \"17.7\", \"versionType\": \"rpm\"}, {\"status\": \"affected\", \"version\": \"16\", \"lessThan\": \"16.11\", \"versionType\": \"rpm\"}, {\"status\": \"affected\", \"version\": \"15\", \"lessThan\": \"15.15\", \"versionType\": \"rpm\"}, {\"status\": \"affected\", \"version\": \"14\", \"lessThan\": \"14.20\", \"versionType\": \"rpm\"}, {\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"13.23\", \"versionType\": \"rpm\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://www.postgresql.org/support/security/CVE-2025-12818/\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Integer wraparound in multiple PostgreSQL libpq client library functions allows an application input provider or network peer to cause libpq to undersize an allocation and write out-of-bounds by hundreds of megabytes.  This results in a segmentation fault for the application using libpq.  Versions before PostgreSQL 18.1, 17.7, 16.11, 15.15, 14.20, and 13.23 are affected.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-190\", \"description\": \"Integer Overflow or Wraparound\"}]}], \"providerMetadata\": {\"orgId\": \"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007\", \"shortName\": \"PostgreSQL\", \"dateUpdated\": \"2025-11-13T13:00:12.911Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-12818\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-13T13:59:33.436Z\", \"dateReserved\": \"2025-11-06T17:22:32.130Z\", \"assignerOrgId\": \"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007\", \"datePublished\": \"2025-11-13T13:00:12.911Z\", \"assignerShortName\": \"PostgreSQL\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.