What’s Vulnerable › Vulnerabilities

CVE-2021-3546

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-02 · updated 2026-06-17
• Weakness: CWE-787

Description

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.

Affected products

• Debian Linux: 11.0
• QEMU: through 6.0.0

References

• http://www.openwall.com/lists/oss-security/2021/05/31/1
• https://bugzilla.redhat.com/show_bug.cgi?id=1958978
• https://security.gentoo.org/glsa/202208-27
• https://security.netapp.com/advisory/ntap-20210720-0008/
• https://www.debian.org/security/2021/dsa-4980
• http://www.openwall.com/lists/oss-security/2021/05/31/1
• https://bugzilla.redhat.com/show_bug.cgi?id=1958978
• https://security.gentoo.org/glsa/202208-27
• https://security.netapp.com/advisory/ntap-20210720-0008/
• https://www.debian.org/security/2021/dsa-4980

Get alerted when CVE-2021-3546 or the next vulnerability affects your stack