Vulnerability-Lookup

GHSA-7JCV-X7MF-56Q8

Vulnerability from github – Published: 2026-04-30 09:30 – Updated: 2026-05-10 09:31

Details

An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data to overwrite adjacent execve(2) argument buffers.

The bug may be exploitable by an unprivileged user to obtain superuser privileges.

Severity ?

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-7270"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-783"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-30T07:16:41Z",
    "severity": "HIGH"
  },
  "details": "An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data to overwrite adjacent execve(2) argument buffers.\n\nThe bug may be exploitable by an unprivileged user to obtain superuser privileges.",
  "id": "GHSA-7jcv-x7mf-56q8",
  "modified": "2026-05-10T09:31:32Z",
  "published": "2026-04-30T09:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7270"
    },
    {
      "type": "WEB",
      "url": "https://blog.calif.io/p/cve-2026-7270-how-i-get-root-on-freebsd"
    },
    {
      "type": "WEB",
      "url": "https://news.ycombinator.com/item?id=48077971"
    },
    {
      "type": "WEB",
      "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:13.exec.asc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-7270 (GCVE-0-2026-7270)

Vulnerability from cvelistv5 – Published: 2026-04-30 07:02 – Updated: 2026-05-10 06:55

Title

Local privilege escalation via execve()

Summary

An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data to overwrite adjacent execve(2) argument buffers. The bug may be exploitable by an unprivileged user to obtain superuser privileges.

Severity ?

7.8 (High)


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

CWE

CWE-783 - Operator Precedence Logic Error

Assigner

freebsd

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

Ryan Austin of Calif.io

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-7270",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-30T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-01T03:55:53.412Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-10T06:55:17.771Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://blog.calif.io/p/cve-2026-7270-how-i-get-root-on-freebsd"
          },
          {
            "url": "https://news.ycombinator.com/item?id=48077971"
          }
        ],
        "title": "CVE Program Container",
        "x_generator": {
          "engine": "ADPogram 0.0.1"
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    ],
    "cna": {
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        {
          "defaultStatus": "unknown",
          "modules": [
            "kernel"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p7",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p3",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p12",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p13",
              "status": "affected",
              "version": "13.5-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Ryan Austin of Calif.io"
        }
      ],
      "datePublic": "2026-04-29T19:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data to overwrite adjacent execve(2) argument buffers.\n\nThe bug may be exploitable by an unprivileged user to obtain superuser privileges."
        }
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-783",
              "description": "CWE-783: Operator Precedence Logic Error",
              "lang": "en",
              "type": "CWE"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-04-30T07:02:48.276Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:13.exec.asc"
        }
      ],
      "title": "Local privilege escalation via execve()",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-7270",
    "datePublished": "2026-04-30T07:02:48.276Z",
    "dateReserved": "2026-04-28T05:26:31.296Z",
    "dateUpdated": "2026-05-10T06:55:17.771Z",
    "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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-7JCV-X7MF-56Q8

CVE-2026-7270 (GCVE-0-2026-7270)

Tags

Sightings

Nomenclature