certfr_avis - certfr-2026-avi-0716

CERTFR-2026-AVI-0716

Vulnerability from certfr_avis

De multiples vulnérabilités ont été découvertes dans FreeBSD. Elles permettent à un attaquant de provoquer une élévation de privilèges.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
FreeBSD	FreeBSD	FreeBSD branche 14.4 versions antérieures à 14.4-n273719
FreeBSD	FreeBSD	FreeBSD branche 14.3 versions antérieures à 14.3-n271519
FreeBSD	FreeBSD	FreeBSD branche 14 versions antérieures à 14-n274315
FreeBSD	FreeBSD	FreeBSD branche 15 versions antérieures à 15-n283886
FreeBSD	FreeBSD	FreeBSD branche 15.1 versions antérieures à 15.1-n283555
FreeBSD	FreeBSD	FreeBSD branche 15.0 versions antérieures à 15.0-n281057

References

Title

Publication Time

Tags

Bulletin de sécurité FreeBSD FreeBSD-SA-26:26	2026-06-09	vendor-advisory
Bulletin de sécurité FreeBSD FreeBSD-SA-26:30	2026-06-09	vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "FreeBSD branche 14.4 versions ant\u00e9rieures \u00e0 14.4-n273719",
      "product": {
        "name": "FreeBSD",
        "vendor": {
          "name": "FreeBSD",
          "scada": false
        }
      }
    },
    {
      "description": "FreeBSD branche 14.3 versions ant\u00e9rieures \u00e0 14.3-n271519",
      "product": {
        "name": "FreeBSD",
        "vendor": {
          "name": "FreeBSD",
          "scada": false
        }
      }
    },
    {
      "description": "FreeBSD branche 14 versions ant\u00e9rieures \u00e0 14-n274315",
      "product": {
        "name": "FreeBSD",
        "vendor": {
          "name": "FreeBSD",
          "scada": false
        }
      }
    },
    {
      "description": "FreeBSD branche 15 versions ant\u00e9rieures \u00e0 15-n283886",
      "product": {
        "name": "FreeBSD",
        "vendor": {
          "name": "FreeBSD",
          "scada": false
        }
      }
    },
    {
      "description": "FreeBSD branche 15.1 versions ant\u00e9rieures \u00e0 15.1-n283555",
      "product": {
        "name": "FreeBSD",
        "vendor": {
          "name": "FreeBSD",
          "scada": false
        }
      }
    },
    {
      "description": "FreeBSD branche 15.0 versions ant\u00e9rieures \u00e0 15.0-n281057",
      "product": {
        "name": "FreeBSD",
        "vendor": {
          "name": "FreeBSD",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2026-45257",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-45257"
    },
    {
      "name": "CVE-2026-49413",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-49413"
    }
  ],
  "initial_release_date": "2026-06-10T00:00:00",
  "last_revision_date": "2026-06-12T00:00:00",
  "links": [],
  "reference": "CERTFR-2026-AVI-0716",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2026-06-10T00:00:00.000000"
    },
    {
      "description": "Ajout du bulletin de s\u00e9curit\u00e9 FreeBSD FreeBSD-SA-26:26 du 9 juin 2026.",
      "revision_date": "2026-06-12T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "\u00c9l\u00e9vation de privil\u00e8ges"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans FreeBSD. Elles permettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges.",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans FreeBSD",
  "vendor_advisories": [
    {
      "published_at": "2026-06-09",
      "title": "Bulletin de s\u00e9curit\u00e9 FreeBSD FreeBSD-SA-26:26",
      "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-26:26.ktls.asc"
    },
    {
      "published_at": "2026-06-09",
      "title": "Bulletin de s\u00e9curit\u00e9 FreeBSD FreeBSD-SA-26:30",
      "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-26:30.linux.asc"
    }
  ]
}

CVE-2026-49413 (GCVE-0-2026-49413)

Vulnerability from cvelistv5

Published

2026-06-27 09:08

Modified

2026-06-29 13:05

Severity ?

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

CWE

CWE-266 - Incorrect Privilege Assignment

Summary

The Linuxulator determined whether a binary was set-user-ID or set-group-ID by checking the P_SUGID process flag. During execve(2), this flag is not yet set at the point where the auxiliary vector is constructed, so AT_SECURE was incorrectly set to zero for set-user-ID and set-group-ID executables. An unprivileged local user can inject a shared library via LD_PRELOAD into a set-user-ID or set-group-ID Linux binary, gaining the privileges of that binary.

References

URL

Tags

https://security.freebsd.org/advisories/FreeBSD-SA-26:30.linux.asc

vendor-advisory

Impacted products

	Vendor	Product	Version
	FreeBSD	FreeBSD	Version: 15.0-RELEASE Version: 14.4-RELEASE Version: 14.3-RELEASE

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.1,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-49413",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-29T13:05:31.678040Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-29T13:05:38.668Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "linux"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p10",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p6",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p15",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Minseong Kim of NSHC Red Alert Labs"
        }
      ],
      "datePublic": "2026-06-09T23:30:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The Linuxulator determined whether a binary was set-user-ID or set-group-ID by checking the P_SUGID process flag.  During execve(2), this flag is not yet set at the point where the auxiliary vector is constructed, so AT_SECURE was incorrectly set to zero for set-user-ID and set-group-ID executables.\n\nAn unprivileged local user can inject a shared library via LD_PRELOAD into a set-user-ID or set-group-ID Linux binary, gaining the privileges of that binary."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-266",
              "description": "CWE-266: Incorrect Privilege Assignment",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-27T09:08:23.756Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:30.linux.asc"
        }
      ],
      "title": "Flaw in Linuxulator execution of setugid binaries",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-49413",
    "datePublished": "2026-06-27T09:08:23.756Z",
    "dateReserved": "2026-05-29T20:24:28.615Z",
    "dateUpdated": "2026-06-29T13:05:38.668Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-45257 (GCVE-0-2026-45257)

Vulnerability from cvelistv5

Published

2026-06-26 14:50

Modified

2026-06-27 03:55

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-123 - Write-what-where Condition

Summary

The KTLS receive path decrypted each record in place, assuming that the mbufs holding received data were anonymous and safe to modify. This assumption does not hold for data placed on a socket by sendfile(2), which can reference file-backed memory directly through non-anonymous M_EXTPG pages or EXT_SFBUF mbufs. When the sender transmits such data over a loopback connection without enabling KTLS on the transmit side, the file-backed mbufs reach the receiver's decryption path unchanged. Decrypting a record in place then overwrites the backing file's page cache instead of a private copy of the data. An unprivileged local user who can read a file can overwrite its contents with data of their choosing by sending the file over a loopback connection on which they have enabled KTLS receive. The write modifies the page cache directly, so it bypasses file flags such as schg and is written back to disk. By overwriting a setuid binary or other trusted file, a local user can escalate privileges, potentially gaining full control of the affected system.

References

URL

Tags

https://security.freebsd.org/advisories/FreeBSD-SA-26:26.ktls.asc

vendor-advisory

Impacted products

	Vendor	Product	Version
	FreeBSD	FreeBSD	Version: 15.0-RELEASE Version: 14.4-RELEASE Version: 14.3-RELEASE

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-06-26T14:57:59.851Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/10/20"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/10/21"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "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-2026-45257",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-11T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-27T03:55:21.399Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "third-party-advisory",
              "exploit"
            ],
            "url": "https://www.heise.de/en/news/FreeBSD-Privilege-Escalation-Vulnerability-with-Tongue-in-Cheek-Codename-11329109.html"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "ktls"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p10",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p6",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p15",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Bumsrakete"
        }
      ],
      "datePublic": "2026-06-09T23:30:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The KTLS receive path decrypted each record in place, assuming that the mbufs holding received data were anonymous and safe to modify.  This assumption does not hold for data placed on a socket by sendfile(2), which can reference file-backed memory directly through non-anonymous M_EXTPG pages or EXT_SFBUF mbufs.  When the sender transmits such data over a loopback connection without enabling KTLS on the transmit side, the file-backed mbufs reach the receiver\u0027s decryption path unchanged.  Decrypting a record in place then overwrites the backing file\u0027s page cache instead of a private copy of the data.\n\nAn unprivileged local user who can read a file can overwrite its contents with data of their choosing by sending the file over a loopback connection on which they have enabled KTLS receive.  The write modifies the page cache directly, so it bypasses file flags such as schg and is written back to disk.  By overwriting a setuid binary or other trusted file, a local user can escalate privileges, potentially gaining full control of the affected system."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-123",
              "description": "CWE-123 Write-what-where Condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-26T14:50:27.157Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:26.ktls.asc"
        }
      ],
      "title": "Arbitrary file overwrite via the KTLS receive path",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-45257",
    "datePublished": "2026-06-26T14:50:27.157Z",
    "dateReserved": "2026-05-11T16:27:44.891Z",
    "dateUpdated": "2026-06-27T03:55:21.399Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

CERTFR-2026-AVI-0716

Vulnerability from certfr_avis

Solutions

CVE-2026-49413 (GCVE-0-2026-49413)

Vulnerability from cvelistv5

CVE-2026-45257 (GCVE-0-2026-45257)

Vulnerability from cvelistv5

Tags

Sightings

Nomenclature