Vulnerability-Lookup

CVE-2026-25704 (GCVE-0-2026-25704)

Vulnerability from cvelistv5 – Published: 2026-03-30 07:44 – Updated: 2026-03-30 15:16

Title

Incomplete privilege drop for com.system76.CosmicGreeter.GetUserData

Summary

A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic. This issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.

Severity ?

5.8 (Medium)


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

CWE

CWE-271 - Privilege Dropping / Lowering Errors
CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Assigner

suse

References

URL

Tags

https://bugzilla.suse.com/show_bug.cgi?id=CVE-202…

Impacted products

	Vendor	Product	Version
	pop-os	cosmic-greeter	Affected: ? , < https://github.com/pop-os/cosmic-greeter/pull/426 (git)

Date Public ?

2026-03-11 11:25

Credits

Matthias Gerstner of SUSE

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-25704",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-30T15:15:22.499459Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-30T15:16:08.947Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "cosmic-greeter",
          "product": "cosmic-greeter",
          "vendor": "pop-os",
          "versions": [
            {
              "lessThan": "https://github.com/pop-os/cosmic-greeter/pull/426",
              "status": "affected",
              "version": "?",
              "versionType": "git"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Matthias Gerstner of SUSE"
        }
      ],
      "datePublic": "2026-03-11T11:25:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003eA Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in\u0026nbsp; cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cp\u003eThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.\u003c/p\u003e"
            }
          ],
          "value": "A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in\u00a0 cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\n\n\n\n\nThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "HIGH",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-271",
              "description": "CWE-271: Privilege Dropping / Lowering Errors",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-367",
              "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-30T07:44:39.672Z",
        "orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
        "shortName": "suse"
      },
      "references": [
        {
          "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25704"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Incomplete privilege drop for com.system76.CosmicGreeter.GetUserData",
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
    "assignerShortName": "suse",
    "cveId": "CVE-2026-25704",
    "datePublished": "2026-03-30T07:44:39.672Z",
    "dateReserved": "2026-02-05T15:37:24.184Z",
    "dateUpdated": "2026-03-30T15:16:08.947Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-25704\",\"sourceIdentifier\":\"meissner@suse.de\",\"published\":\"2026-03-30T08:16:16.990\",\"lastModified\":\"2026-03-30T13:26:07.647\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in\u00a0 cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\\n\\n\\n\\n\\nThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"meissner@suse.de\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/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\",\"baseScore\":5.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"LOW\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"meissner@suse.de\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-271\"},{\"lang\":\"en\",\"value\":\"CWE-367\"}]}],\"references\":[{\"url\":\"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25704\",\"source\":\"meissner@suse.de\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-25704\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-30T15:15:22.499459Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-30T15:15:57.804Z\"}}], \"cna\": {\"title\": \"Incomplete privilege drop for com.system76.CosmicGreeter.GetUserData\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Matthias Gerstner of SUSE\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 5.8, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"LOW\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"pop-os\", \"product\": \"cosmic-greeter\", \"versions\": [{\"status\": \"affected\", \"version\": \"?\", \"lessThan\": \"https://github.com/pop-os/cosmic-greeter/pull/426\", \"versionType\": \"git\"}], \"packageName\": \"cosmic-greeter\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-03-11T11:25:00.000Z\", \"references\": [{\"url\": \"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25704\"}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.1\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in\\u00a0 cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\\n\\n\\n\\n\\nThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cdiv\u003eA Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in\u0026nbsp; cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cp\u003eThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-271\", \"description\": \"CWE-271: Privilege Dropping / Lowering Errors\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-367\", \"description\": \"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition\"}]}], \"providerMetadata\": {\"orgId\": \"404e59f5-483d-4b8a-8e7a-e67604dd8afb\", \"shortName\": \"suse\", \"dateUpdated\": \"2026-03-30T07:44:39.672Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-25704\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-30T15:16:08.947Z\", \"dateReserved\": \"2026-02-05T15:37:24.184Z\", \"assignerOrgId\": \"404e59f5-483d-4b8a-8e7a-e67604dd8afb\", \"datePublished\": \"2026-03-30T07:44:39.672Z\", \"assignerShortName\": \"suse\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-25704

Vulnerability from fkie_nvd - Published: 2026-03-30 08:16 - Updated: 2026-03-30 13:26

Severity ?

5.8 (Medium) - CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	meissner@suse.de	https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25704

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in\u00a0 cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\n\n\n\n\nThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de condici\u00f3n de carrera de errores de eliminaci\u00f3n/reducci\u00f3n de privilegios/tiempo de verificaci\u00f3n, tiempo de uso (TOCTOU) en cosmic-greeter puede permitir a un atacante recuperar privilegios que deber\u00edan haber sido eliminados y abusar de ellos en la l\u00f3gica de verificaci\u00f3n propensa a condiciones de carrera.\n\nEste problema afecta a cosmic-greeter antes de https://github.Com/pop-os/cosmic-greeter/pull/426."
    }
  ],
  "id": "CVE-2026-25704",
  "lastModified": "2026-03-30T13:26:07.647",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.8,
          "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": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/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": "HIGH",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "meissner@suse.de",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-30T08:16:16.990",
  "references": [
    {
      "source": "meissner@suse.de",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25704"
    }
  ],
  "sourceIdentifier": "meissner@suse.de",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-271"
        },
        {
          "lang": "en",
          "value": "CWE-367"
        }
      ],
      "source": "meissner@suse.de",
      "type": "Primary"
    }
  ]
}

GHSA-H5VX-6JH5-QHQ7

Vulnerability from github – Published: 2026-03-30 09:31 – Updated: 2026-03-30 09:31

Details

This issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.

Severity ?

5.8 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-25704"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-271"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-30T08:16:16Z",
    "severity": "MODERATE"
  },
  "details": "A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in\u00a0 cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.\n\n\n\n\nThis issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.",
  "id": "GHSA-h5vx-6jh5-qhq7",
  "modified": "2026-03-30T09:31:28Z",
  "published": "2026-03-30T09:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25704"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25704"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/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"
    }
  ]
}

Sightings

Author	Source	Type	Date

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

CVE-2026-25704 (GCVE-0-2026-25704)

FKIE_CVE-2026-25704

GHSA-H5VX-6JH5-QHQ7

Tags

Sightings

Nomenclature