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CVE-2026-88264 (GCVE-0-2026-88264)

Vulnerability from cvelistv5 – Published: 2026-09-10 08:40 – Updated: 2026-09-25 22:28

Title

Crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs

Summary

A flaw was found in crun. When the container configuration does not give /dev a dedicated mount, terminal setup can redirect /dev/console onto an attacker-controlled path, including via the read-only-rootfs bind-mount fallback. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.

Severity

5.6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-10 12:52 UTC

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

redhat redhat root

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:71668	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-88264	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2531223	issue-trackingx_refsource_REDHAT
https://github.com/containers/crun/

Impacted products

6 products

Vendor	Product	Version
containers	crun	Affected: 0 , ≤ 1.29.1 (semver)
Red Hat	Red Hat Hardened Images	Unaffected: 1.30-1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-09-10 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      ],
      "title": "Crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs",
      "workarounds": [
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          "lang": "en",
          "value": "Always mount /dev (Podman/crun default). Do not run untrusted images with a /dev-less config."
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  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-47766 (GCVE-0-2026-47766)

Vulnerability from cvelistv5 – Published: 2026-08-14 16:16 – Updated: 2026-08-14 16:32

Title

crun follows rootfs /dev symlink while creating default devices

Summary

crun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun's default device setup opens the container rootfs `/dev` directory without `O_NOFOLLOW`. If an OCI bundle contains `rootfs/dev` as a symlink and the bundle configuration does not mount `/dev`, crun follows that symlink and creates the default device nodes and stdio symlinks at the symlink target outside the container rootfs. In a local rootful crun replay, this created fixed device nodes and symlinks outside the rootfs before crun returned failure. A pre-existing file named `ptmx` in the target directory was also replaced by crun's forced `ptmx -> pts/ptmx` symlink. Version 1.28 fixes the issue.

Severity

5.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 16:32 UTC

CWE

CWE-61 - UNIX Symbolic Link (Symlink) Following

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/containers/crun/security/advis…	x_refsource_CONFIRM
https://github.com/containers/crun/releases/tag/1.28	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
containers	crun	Affected: < 1.28

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
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        }
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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 · CISA-ADP (v2.0.3)

Decision recorded 2026-03-26 18:09 UTC

CWE

CWE-269 - Improper Privilege Management

Assigner

GitHub_M mitre root

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": [
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        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-30892",
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}

CVE-2025-24965 (GCVE-0-2025-24965)

Vulnerability from cvelistv5 – Published: 2025-02-19 16:46 – Updated: 2025-02-19 16:56

Title

.krun_config.json symlink attack creates or overwrites file on the host in crun

Summary

crun is an open source OCI Container Runtime fully written in C. In affected versions A malicious container image could trick the krun handler into escaping the root filesystem, allowing file creation or modification on the host. No special permissions are needed, only the ability for the current user to write to the target file. The problem is fixed in crun 1.20 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

Severity

8.5 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-19 16:55 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/containers/crun/security/advis…	x_refsource_CONFIRM
https://github.com/containers/crun/commit/0aec82c…	x_refsource_MISC
https://github.com/containers/crun/releases/tag/1.20	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
containers	crun	Affected: < 1.20

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-24965",
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-19T16:55:57.068827Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-19T16:56:05.966Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "crun",
          "vendor": "containers",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.20"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "crun is an open source OCI Container Runtime fully written in C. In affected versions A malicious container image could trick the krun handler into escaping the root filesystem, allowing file creation or modification on the host. No special permissions are needed, only the ability for the current user to write to the target file. The problem is fixed in crun 1.20 and all users are advised to upgrade. There are no known workarounds for this vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-02-19T16:46:31.602Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/containers/crun/security/advisories/GHSA-f42g-r5jj-qh4j",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/containers/crun/security/advisories/GHSA-f42g-r5jj-qh4j"
        },
        {
          "name": "https://github.com/containers/crun/commit/0aec82c2b686f0b1793deed43b46524fe2e8b5a7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/containers/crun/commit/0aec82c2b686f0b1793deed43b46524fe2e8b5a7"
        },
        {
          "name": "https://github.com/containers/crun/releases/tag/1.20",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/containers/crun/releases/tag/1.20"
        }
      ],
      "source": {
        "advisory": "GHSA-f42g-r5jj-qh4j",
        "discovery": "UNKNOWN"
      },
      "title": ".krun_config.json symlink attack creates or overwrites file on the host in crun"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-24965",
    "datePublished": "2025-02-19T16:46:31.602Z",
    "dateReserved": "2025-01-29T15:18:03.209Z",
    "dateUpdated": "2025-02-19T16:56:05.966Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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4 vulnerabilities found for crun by containers

CVE-2026-88264 (GCVE-0-2026-88264)

CVE-2026-47766 (GCVE-0-2026-47766)

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

CVE-2025-24965 (GCVE-0-2025-24965)