Vulnerability-Lookup

rlsa-2026:19020

Vulnerability from osv_rocky

Published

2026-05-29 16:03

Modified

2026-06-12 12:06

Summary

Moderate: crun security update

Details

crun is a OCI runtime

Security Fix(es):

crun: crun: Privilege escalation due to incorrect parsing of the --user option (CVE-2026-30892)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

7.8 (High)


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

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:19020	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2451576	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:10",
        "name": "crun",
        "purl": "pkg:rpm/rocky-linux/crun?distro=rocky-linux-10\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "AppStream"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:1.27-2.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "details": "crun is a OCI runtime\n\nSecurity Fix(es):\n\n* crun: crun: Privilege escalation due to incorrect parsing of the `--user` option (CVE-2026-30892)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:19020",
  "modified": "2026-06-12T12:06:10.194783Z",
  "published": "2026-05-29T16:03:24.060458Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:19020"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451576"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Moderate: crun security update",
  "upstream": [
    "CVE-2026-30892"
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-03-25 23:57 – Updated: 2026-03-26 18:10

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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-269 - Improper Privilege Management

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/containers/crun/security/advis…	x_refsource_CONFIRM
https://github.com/containers/crun/commit/1bd7f42…	x_refsource_MISC
https://github.com/containers/crun/releases/tag/1.27	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
containers	crun	Affected: >= 1.19, < 1.27

Show details on NVD website

JSON

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"
}

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.

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.

Action not permitted

rlsa-2026:19020

Vulnerability from osv_rocky

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

Tags

Sightings

Nomenclature