Vulnerability-Lookup

FKIE_CVE-2026-35547

Vulnerability from fkie_nvd - Published: 2026-04-30 09:16 - Updated: 2026-06-17 10:40

Severity

8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

When processing the header of an incoming message, libnv failed to properly validate the message size. The lack of validation allows a malicious program to write outside the bounds of a heap allocation. This can trigger a crash or system panic, and it may be possible for an unprivileged user to exploit the bug to elevate their privileges.

References

	URL	Tags
	secteam@freebsd.org	https://security.freebsd.org/advisories/FreeBSD-SA-26:17.libnv.asc	Vendor Advisory

Impacted products

Vendor	Product	Version
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	13.5
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.3
freebsd	freebsd	14.4
freebsd	freebsd	14.4
freebsd	freebsd	14.4
freebsd	freebsd	14.4
freebsd	freebsd	15.0
freebsd	freebsd	15.0
freebsd	freebsd	15.0
freebsd	freebsd	15.0
freebsd	freebsd	15.0
freebsd	freebsd	15.0
freebsd	freebsd	15.0

JSON

To clipboard

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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
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    }
  ],
  "id": "CVE-2026-35547",
  "lastModified": "2026-06-17T10:40:45.567",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
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        "type": "Secondary"
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        "ssvcData": {
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          "options": [
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            },
            {
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            {
              "technicalImpact": "total"
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          ],
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          "timestamp": "2026-05-01T03:55:50.905074Z",
          "version": "2.0.3"
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  "published": "2026-04-30T09:16:03.167",
  "references": [
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      "tags": [
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      "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:17.libnv.asc"
    }
  ],
  "sourceIdentifier": "secteam@freebsd.org",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "CWE-122"
        },
        {
          "lang": "en",
          "value": "CWE-130"
        }
      ],
      "source": "secteam@freebsd.org",
      "type": "Secondary"
    }
  ]
}

CVE-2026-35547 (GCVE-0-2026-35547)

Vulnerability from cvelistv5 – Published: 2026-04-30 08:08 – Updated: 2026-05-01 15:26

Title

Heap overflow in libnv

Summary

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-01 03:55 UTC

CWE

CWE-122 - Heap-based Buffer Overflow
CWE-130 - Improper Handling of Length Parameter Inconsistency

Assigner

freebsd CNA under the mitre root

CNA scorecard D 60/100 over 56 records in the last 180 days details

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.0-RELEASE , < p7 (release) Affected: 14.4-RELEASE , < p3 (release) Affected: 14.3-RELEASE , < p12 (release) Affected: 13.5-RELEASE , < p13 (release)

Date Public

2026-04-29 19:00

Credits

Mariusz Zaborski

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.1,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-35547",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-01T03:55:50.905074Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-01T15:26:28.941Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "libnv"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p7",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
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              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
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              "versionType": "release"
            },
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              "status": "affected",
              "version": "13.5-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Mariusz Zaborski"
        }
      ],
      "datePublic": "2026-04-29T19:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-130",
              "description": "CWE-130: Improper Handling of Length Parameter Inconsistency",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-30T08:08:13.461Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
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          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:17.libnv.asc"
        }
      ],
      "title": "Heap overflow in libnv",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-35547",
    "datePublished": "2026-04-30T08:08:13.461Z",
    "dateReserved": "2026-04-28T15:08:10.642Z",
    "dateUpdated": "2026-05-01T15:26:28.941Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

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.

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