Security readout for executives and security teams
This flaw affects QEMU’s vhost-user GPU device. A malicious virtual machine guest could make QEMU expose uninitialized host memory. The main business concern is information leakage across a virtualization boundary, especially where untrusted or multi-tenant guests run on affected hosts. Exposure is most likely on virtualization hosts or products using QEMU vhost-user-gpu with QEMU 6.0 or earlier. Systems not using QEMU, not exposing vhost-user-gpu, or not running untrusted guests have lower apparent exposure based on the provided sources. Treat this as a targeted virtualization risk, not a broad internet-facing emergency. Prioritize environments where guest workloads are untrusted or multi-tenant because the flaw crosses the guest-to-host confidentiality boundary. Mitigation focus: Inventory QEMU deployments and identify versions up to and including 6.0.; Check relevant vendor advisories for fixed QEMU packages or product-specific updates.; Prioritize updates on hosts running untrusted, tenant-controlled, or externally supplied guests..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-908: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-3545 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.redhat.com/show_bug.cgi?id=1958955CVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20210720-0008/CVE reference · x_refsource_CONFIRM
- DSA-4980CVE reference · vendor-advisory, x_refsource_DEBIAN
- GLSA-202208-27CVE reference · vendor-advisory, x_refsource_GENTOO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of Uninitialized Resource
Use of Uninitialized Resource represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.