CVE-2026-30892 (GCVE-0-2026-30892)

Vulnerability from cvelistv5 – Published: 2026-03-25 23:57 – Updated: 2026-03-26 18:10
VLAI?
Title
Crun incorrectly parses `crun exec` option `-u`, leading to privilege escalation
Summary
crun is an open source OCI Container Runtime fully written in C. In versions 1.19 through 1.26, the `crun exec` option `-u` (`--user`) is incorrectly parsed. The value `1` is interpreted as UID 0 and GID 0 when it should have been UID 1 and GID 0. The process thus runs with higher privileges than expected. Version 1.27 patches the issue.
Severity ?
0 (None)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
CWE
  • CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
Vendor Product Version
containers crun Affected: >= 1.19, < 1.27
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-30892",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-26T18:09:51.829145Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-26T18:10:16.318Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "crun",
          "vendor": "containers",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.19, \u003c 1.27"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "crun is an open source OCI Container Runtime fully written in C. In versions 1.19 through 1.26, the  `crun exec` option `-u` (`--user`) is incorrectly parsed. The value `1` is interpreted as UID 0 and GID 0 when it should have been UID 1 and  GID 0. The process thus runs with higher privileges than expected. Version 1.27 patches the issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 0,
            "baseSeverity": "NONE",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-269",
              "description": "CWE-269: Improper Privilege Management",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T23:57:01.741Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj"
        },
        {
          "name": "https://github.com/containers/crun/commit/1bd7f42446999b0e76bc3d575392e05c943b0b01",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/containers/crun/commit/1bd7f42446999b0e76bc3d575392e05c943b0b01"
        },
        {
          "name": "https://github.com/containers/crun/releases/tag/1.27",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/containers/crun/releases/tag/1.27"
        }
      ],
      "source": {
        "advisory": "GHSA-4vg2-xjqj-7chj",
        "discovery": "UNKNOWN"
      },
      "title": "Crun incorrectly parses `crun exec` option `-u`, leading to privilege escalation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-30892",
    "datePublished": "2026-03-25T23:57:01.741Z",
    "dateReserved": "2026-03-06T00:04:56.701Z",
    "dateUpdated": "2026-03-26T18:10:16.318Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-30892\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-03-26T00:16:38.953\",\"lastModified\":\"2026-03-27T20:29:27.293\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"crun is an open source OCI Container Runtime fully written in C. In versions 1.19 through 1.26, the  `crun exec` option `-u` (`--user`) is incorrectly parsed. The value `1` is interpreted as UID 0 and GID 0 when it should have been UID 1 and  GID 0. The process thus runs with higher privileges than expected. Version 1.27 patches the issue.\"},{\"lang\":\"es\",\"value\":\"crun es un entorno de ejecuci\u00f3n de contenedores OCI de c\u00f3digo abierto escrito \u00edntegramente en C. En las versiones 1.19 a 1.26, la opci\u00f3n `-u` (`--user`) de `crun exec` se analiza de forma incorrecta. El valor `1` se interpreta como UID 0 y GID 0, cuando deber\u00eda haber sido UID 1 y GID 0. Por lo tanto, el proceso se ejecuta con privilegios m\u00e1s elevados de lo esperado. La versi\u00f3n 1.27 corrige el problema.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N\",\"baseScore\":0.0,\"baseSeverity\":\"NONE\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.5,\"impactScore\":0.0},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-269\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:crun_project:crun:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.19\",\"versionEndExcluding\":\"1.27\",\"matchCriteriaId\":\"BD451ABD-D466-4EB5-969D-E7D5844BDAA8\"}]}]}],\"references\":[{\"url\":\"https://github.com/containers/crun/commit/1bd7f42446999b0e76bc3d575392e05c943b0b01\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/containers/crun/releases/tag/1.27\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Product\"]},{\"url\":\"https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-30892\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-26T18:09:51.829145Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-26T18:09:59.199Z\"}}], \"cna\": {\"title\": \"Crun incorrectly parses `crun exec` option `-u`, leading to privilege escalation\", \"source\": {\"advisory\": \"GHSA-4vg2-xjqj-7chj\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 0, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"containers\", \"product\": \"crun\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 1.19, \u003c 1.27\"}]}], \"references\": [{\"url\": \"https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj\", \"name\": \"https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/containers/crun/commit/1bd7f42446999b0e76bc3d575392e05c943b0b01\", \"name\": \"https://github.com/containers/crun/commit/1bd7f42446999b0e76bc3d575392e05c943b0b01\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/containers/crun/releases/tag/1.27\", \"name\": \"https://github.com/containers/crun/releases/tag/1.27\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"crun is an open source OCI Container Runtime fully written in C. In versions 1.19 through 1.26, the  `crun exec` option `-u` (`--user`) is incorrectly parsed. The value `1` is interpreted as UID 0 and GID 0 when it should have been UID 1 and  GID 0. The process thus runs with higher privileges than expected. Version 1.27 patches the issue.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-269\", \"description\": \"CWE-269: Improper Privilege Management\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-03-25T23:57:01.741Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-30892\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-26T18:10:16.318Z\", \"dateReserved\": \"2026-03-06T00:04:56.701Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-03-25T23:57:01.741Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.