CVE-2021-3545

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% 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-908

Description

An information disclosure 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 exists in virgl_cmd_get_capset_info() in contrib/vhost-user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host.

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=1958955
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=1958955
https://security.gentoo.org/glsa/202208-27
https://security.netapp.com/advisory/ntap-20210720-0008/
https://www.debian.org/security/2021/dsa-4980

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