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CVE-2026-63623— Libvirt: information disclosure via world-readable storage volume images during clone/convert

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libvirt是libvirt组织开源的一个虚拟化平台管理工具。 libvirt存在权限许可和访问控制问题漏洞，该漏洞源于qemu-img工具运行时的文件创建设置过于宽松，导致存储卷克隆或转换操作期间新创建的卷镜像暂时全局可读，可能允许任何本地用户读取完整客户机磁盘内容，造成敏感信息泄露。

CVSS 5.5 · Medium EPSS 0.14% · P3

Affected Version Matrix 6

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any affected
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
Red Hat Red Hat Enterprise Linux for NVIDIA 26 any unknown
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I. Basic Information for CVE-2026-63623

Vulnerability Information
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Vulnerability Title
Libvirt: information disclosure via world-readable storage volume images during clone/convert
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
Source: CVE Program / CVE List V5
Vulnerability Title
libvirt 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libvirt是libvirt组织开源的一个虚拟化平台管理工具。 libvirt存在权限许可和访问控制问题漏洞，该漏洞源于qemu-img工具运行时的文件创建设置过于宽松，导致存储卷克隆或转换操作期间新创建的卷镜像暂时全局可读，可能允许任何本地用户读取完整客户机磁盘内容，造成敏感信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
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:

II. Public POCs for CVE-2026-63623

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III. Intelligence Information for CVE-2026-63623

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Vendor Advisories for CVE-2026-63623 (2)

Same Patch Batch · Red Hat · 2026-08-10 · 28 CVEs total

CVE-2026-18948 9.9 CRITICAL Feast: feast: unsafe dill deserialization of registry-stored udfs — rce on feature server
CVE-2026-14450 9.9 CRITICAL Maas-billing: maas api: privilege escalation via forged http headers due to missing authen
CVE-2026-18951 8.8 HIGH Odh-training-operator-rhel9: [trainer v2 security] trn-02: rhoai overlay aggregates trainj
CVE-2026-18950 8.8 HIGH Odh-dashboard: odh-dashboard: confused-deputy privilege escalation via unchecked roleref i
CVE-2026-18949 8.8 HIGH Odh-dashboard: odh-dashboard: clusterrole grants cluster-wide crud on secrets and rbac man
CVE-2026-18982 8.8 HIGH Odh-training-operator-rhel9: rhoai fork aggregates training job create onto native edit/ad
CVE-2026-18617 8.8 HIGH Data-science-pipelines-operator: dspo: mysql dsn parameter injection via customextraparams
CVE-2026-18608 8.7 HIGH Data-science-pipelines-operator: dspo: operator clusterrole grants pods/exec:*, kubeflow.o
CVE-2026-18947 8.5 HIGH Feast: feast: authorization bypass in /materialize endpoints enables dos via unauthorized
CVE-2026-71576 8.5 HIGH Multicluster-global-hub: multicluster-global-hub: manager trusts self-asserted evt.source(
CVE-2026-15467 8.1 HIGH Trustyai-service-operator: trustyai-service-operator: lmevaljob sidecar containers bypass
CVE-2026-15581 8.0 HIGH Trustyai-service-operator: trustyai-service-operator: tas internal service bypasses kube-r
CVE-2026-63622 7.8 HIGH Libvirt: swtpm privilege escalation via symlink following
CVE-2026-18941 7.7 HIGH Feast: feast-operator: feast: default authentication mode is no_auth — shared multi-tenant
CVE-2026-18621 7.6 HIGH Data-sciences-pipeline: dsp: v1 argo template path accepts arbitrary workflow spec, bypass
CVE-2026-19387 7.6 HIGH Gstreamer: gstreamer1-plugins-bad-free: gstreamer: heap out-of-bounds write in adpcmdec im
CVE-2026-18611 7.5 HIGH Data-science-pipelines-operator: dspo: cryptographically weak secret generation (math/rand
CVE-2026-18618 7.5 HIGH Ml-metdata: bundled grpc 1.46.3 (2022) with published http/2 dos cves — directly reachable
CVE-2026-19389 7.1 HIGH Gstreamer: gstreamer1-plugins-ugly-free: gstreamer: integer overflow/underflow in asfdemux
CVE-2026-18620 7.1 HIGH Data-sciences-pipeline: user-controlled serviceaccount for workflow pods without authoriza

Showing top 20 of 28 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-732

V. Comments for CVE-2026-63623

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