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Vulnerabilities / CVE-2016-9603

critical

CVE-2016-9603

Qemu: cirrus: heap buffer overflow via vnc connection

Published Modified CWE 122, 119
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.9CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Red Hat5.5CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (high), Oracle (high), Ubuntu (medium).

Description

A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.

Affected packages and fixed versions

SourcePackageFixed in
alpine 3.10xen4.7.2-r0
alpine 3.11xen4.7.2-r0
alpine 3.12xen4.7.2-r0
alpine 3.13xen4.7.2-r0
alpine 3.14xen4.7.2-r0
alpine 3.15xen4.7.2-r0
alpine 3.16xen4.7.2-r0
alpine 3.17xen4.7.2-r0
alpine 3.18xen4.7.2-r0
alpine 3.19xen4.7.2-r0
alpine 3.20xen4.7.2-r0
alpine 3.21xen4.7.2-r0
Show all 52 entries from 38 sources
SourcePackageFixed in
alpine 3.10xen4.7.2-r0
alpine 3.11xen4.7.2-r0
alpine 3.12xen4.7.2-r0
alpine 3.13xen4.7.2-r0
alpine 3.14xen4.7.2-r0
alpine 3.15xen4.7.2-r0
alpine 3.16xen4.7.2-r0
alpine 3.17xen4.7.2-r0
alpine 3.18xen4.7.2-r0
alpine 3.19xen4.7.2-r0
alpine 3.20xen4.7.2-r0
alpine 3.21xen4.7.2-r0
alpine 3.22xen4.7.2-r0
alpine 3.23xen4.7.2-r0
alpine 3.24xen4.7.2-r0
alpine 3.4xen4.6.3-r8
alpine 3.5xen4.7.2-r0
alpine 3.6xen4.7.2-r0
alpine 3.7xen4.7.2-r0
alpine 3.8xen4.7.2-r0
alpine 3.9xen4.7.2-r0
alpine edgexen4.7.2-r0
debian 11qemu1:2.8+dfsg-4
debian 11xen4.4.0-1
debian 12qemu1:2.8+dfsg-4
debian 12xen4.4.0-1
debian 13qemu1:2.8+dfsg-4
debian 13xen4.4.0-1
debian 14qemu1:2.8+dfsg-4
debian 14xen4.4.0-1
debian 7qemu1.1.2+dfsg-6+deb7u22
debian 7qemu-kvm1.1.2+dfsg-6+deb7u21
debian 7xen4.1.6.lts1-12
debian 8qemu1:2.1+dfsg-12+deb8u7
echoqemu1:2.8+dfsg-4
echoxen4.4.0-1
Oracle Linux 6qemu-guest-agent2:0.12.1.2-2.503.el6_9.3
Oracle Linux 6qemu-img2:0.12.1.2-2.503.el6_9.3
Oracle Linux 6qemu-kvm2:0.12.1.2-2.503.el6_9.3
Oracle Linux 6qemu-kvm-tools2:0.12.1.2-2.503.el6_9.3
Oracle Linux 7qemu-img10:1.5.3-126.el7_3.6
Oracle Linux 7qemu-kvm10:1.5.3-126.el7_3.6
Oracle Linux 7qemu-kvm-common10:1.5.3-126.el7_3.6
Oracle Linux 7qemu-kvm-tools10:1.5.3-126.el7_3.6
Red Hatqemu-kvm-rhevno fix listed
ubuntu 14.04qemu2.0.0+dfsg-2ubuntu1.33
ubuntu 14.04xen4.4.2-0ubuntu0.14.04.11
ubuntu 14.04-ESMqemu2.0.0+dfsg-2ubuntu1.33
ubuntu 16.04qemu1:2.5+dfsg-5ubuntu10.11
ubuntu 16.04-ESMqemu1:2.5+dfsg-5ubuntu10.11
ubuntu 16.10qemu1:2.6.1+dfsg-0ubuntu5.4
ubuntu 17.04qemu1:2.8+dfsg-3ubuntu2.1

References

All 27 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.