Vulnerability-Lookup

oesa-2026-3831

Vulnerability from osv_openeuler

Published

2026-09-14 16:34

Modified

2026-09-14 16:34

Summary

libvirt security update

Details

Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). The main package includes the libvirtd server exporting the virtualization support.

Security Fix(es):

A flaw was found in libvirt. During storage volume clone or convert operations, newly created volume images were temporarily world-readable. This was caused by the qemu-img utility running with overly permissive file creation settings, allowing any local user to read the full guest disk contents. This vulnerability could lead to sensitive information disclosure from guest virtual machines.(CVE-2026-63623)

Severity

5.5 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-63623	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "libvirt-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-client-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-common-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-config-network-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-config-nwfilter-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-interface-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-network-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-nodedev-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-nwfilter-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-qemu-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-secret-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-storage-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-storage-core-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-storage-disk-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-storage-gluster-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-storage-iscsi-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-storage-iscsi-direct-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-storage-logical-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-storage-mpath-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-storage-rbd-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-driver-storage-scsi-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-kvm-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-lock-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-log-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-plugin-lockd-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-plugin-sanlock-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-proxy-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-daemon-qemu-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-debuginfo-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-debugsource-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-devel-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-docs-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-libs-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-nss-9.10.0-37.oe2403sp1.aarch64.rpm",
          "libvirt-wireshark-9.10.0-37.oe2403sp1.aarch64.rpm"
        ],
        "src": [
          "libvirt-9.10.0-37.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "libvirt-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-client-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-common-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-config-network-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-config-nwfilter-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-interface-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-network-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-nodedev-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-nwfilter-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-qemu-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-secret-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-storage-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-storage-core-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-storage-disk-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-storage-gluster-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-storage-iscsi-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-storage-iscsi-direct-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-storage-logical-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-storage-mpath-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-storage-rbd-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-driver-storage-scsi-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-kvm-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-lock-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-log-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-plugin-lockd-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-plugin-sanlock-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-proxy-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-daemon-qemu-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-debuginfo-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-debugsource-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-devel-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-docs-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-libs-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-nss-9.10.0-37.oe2403sp1.x86_64.rpm",
          "libvirt-wireshark-9.10.0-37.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "libvirt",
        "purl": "pkg:rpm/openEuler/libvirt\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.10.0-37.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). The main package includes the libvirtd server exporting the virtualization support.\r\n\r\nSecurity Fix(es):\n\nA flaw was found in libvirt. During storage volume clone or convert operations, newly created volume images were temporarily world-readable. This was caused by the `qemu-img` utility running with overly permissive file creation settings, allowing any local user to read the full guest disk contents. This vulnerability could lead to sensitive information disclosure from guest virtual machines.(CVE-2026-63623)",
  "id": "OESA-2026-3831",
  "modified": "2026-09-14T16:34:48Z",
  "published": "2026-09-14T16:34:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3831"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63623"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libvirt security update",
  "upstream": [
    "CVE-2026-63623"
  ]
}

CVE-2026-63623 (GCVE-0-2026-63623)

Vulnerability from cvelistv5 – Published: 2026-08-10 16:43 – Updated: 2026-08-10 21:10

Title

Libvirt: information disclosure via world-readable storage volume images during clone/convert

Summary

A flaw was found in libvirt. During storage volume clone or convert operations, newly created volume images were temporarily world-readable. This was caused by the `qemu-img` utility running with overly permissive file creation settings, allowing any local user to read the full guest disk contents. This vulnerability could lead to sensitive information disclosure from guest virtual machines.

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-10 18:30 UTC

CWE

CWE-732 - Incorrect Permission Assignment for Critical Resource

Assigner

redhat redhat root

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-63623	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2513066	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
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 Enterprise Linux for NVIDIA 26	cpe:/a:redhat:enterprise_linux_nvidia:

Date Public

2026-07-30 00:00

Credits

Red Hat would like to thank HE WEI (gikaku) for reporting this issue.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-63623",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-10T18:30:24.800409Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-10T21:10:46.846Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "affected",
          "packageName": "libvirt",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "affected",
          "packageName": "libvirt",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "affected",
          "packageName": "libvirt",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "affected",
          "packageName": "virt:rhel/libvirt",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
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          "defaultStatus": "affected",
          "packageName": "libvirt",
          "product": "Red Hat Enterprise Linux 9",
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        },
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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux_nvidia:"
          ],
          "defaultStatus": "unknown",
          "packageName": "libvirt",
          "product": "Red Hat Enterprise Linux for NVIDIA 26",
          "vendor": "Red Hat"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Red Hat would like to thank HE WEI (gikaku) for reporting this issue."
        }
      ],
      "datePublic": "2026-07-30T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw was found in libvirt. During storage volume clone or convert operations, newly created volume images were temporarily world-readable. This was caused by the `qemu-img` utility running with overly permissive file creation settings, allowing any local user to read the full guest disk contents. This vulnerability could lead to sensitive information disclosure from guest virtual machines."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Moderate"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
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            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
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        {
          "descriptions": [
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              "cweId": "CWE-732",
              "description": "Incorrect Permission Assignment for Critical Resource",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-08-10T16:43:19.048Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
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      "references": [
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            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-63623"
        },
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          "name": "RHBZ#2513066",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513066"
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      "timeline": [
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          "value": "Reported to Red Hat."
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          "lang": "en",
          "time": "2026-07-30T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Libvirt: information disclosure via world-readable storage volume images during clone/convert",
      "workarounds": [
        {
          "lang": "en",
          "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."
        }
      ],
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        "engine": "cvelib 1.8.0"
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      "x_redhatCweChain": "CWE-732: Incorrect Permission Assignment for Critical Resource"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-63623",
    "datePublished": "2026-08-10T16:43:19.048Z",
    "dateReserved": "2026-07-17T13:06:13.760Z",
    "dateUpdated": "2026-08-10T21:10:46.846Z",
    "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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.