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TI-2021-02499 Aliases CVE-2021-3546GHSA-m53p-4wch-f983

Out-of-bounds write in QEMU

Priority LOW 36CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Will not fix Red Hat: no fix planned

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command from the guest. It could allow a privileged guest user to crash the QEMU process on the host, resulting in a denial of service condition, or potential code execution with the privileges of the QEMU process.

Why it matters now

EPSS 0.00463 40th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—QEMUAll QEMU versions up to and including 6.0—No fix listedCNA
  • QEMU Vendor— Affected All QEMU versions up to and including 6.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*up to 6.0.0VulnerableQEMU
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* Versions up to 6.0.0 Vulnerable ·QEMU
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 8 Advanced VirtualizationAffectedNo fix planned: Will not fix
Not affected: 7 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 8 Advanced Virtualization
  • Red Hat Enterprise Linux 9
  • Red Hat OpenStack Platform 10 (Newton)
  • Red Hat OpenStack Platform 13 (Queens)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3546
  2. 2026-10-03 Alias added: GHSA-m53p-4wch-f983

References

Advisory 5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences