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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| QEMU | Qemu: | 2.9 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | qemu | 1:2.8+dfsg-4 | — |
| Debian 14 | xen | 4.4.0-1 | — |
| Debian 13 | qemu | 1:2.8+dfsg-4 | — |
| Debian 13 | xen | 4.4.0-1 | — |
| Debian 12 | qemu | 1:2.8+dfsg-4 | — |
| Debian 12 | xen | 4.4.0-1 | — |
| Debian 8 | qemu | 1:2.1+dfsg-12+deb8u7 | DLA-1497-1 |
| Debian 7 | qemu | 1.1.2+dfsg-6+deb7u22 | DLA-1035-1 |
| Debian 7 | qemu-kvm | 1.1.2+dfsg-6+deb7u21 | DLA-939-1 |
| Debian 7 | xen | 4.1.6.lts1-12 | DLA-1270-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.11 | USN-3261-1 |
| Ubuntu 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.33 | USN-3261-1 |
| Ubuntu 14.04 LTS | xen | 4.4.2-0ubuntu0.14.04.11 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | qemu-img +3 | 10:1.5.3-126.el7_3.6 | RHSA-2017:0987 |
| RHEL 7 | qemu-img-rhev +3 | 10:2.6.0-28.el7_3.9 | RHSA-2017:0985 |
| RHEL 6 | qemu-img +6 | 2:0.12.1.2-2.503.el6_9.3 | RHSA-2017:1206, RHSA-2017:1205 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 10 | qemu-img-rhev +3 | 10:2.6.0-28.el7_3.9 | RHSA-2017:0988 |
| Red Hat OpenStack 9 | qemu-img-rhev +3 | 10:2.6.0-28.el7_3.9 | RHSA-2017:0984 |
| Red Hat OpenStack 8 | qemu-img-rhev +3 | 10:2.6.0-28.el7_3.9 | RHSA-2017:0983 |
| Red Hat OpenStack 7 | qemu-img-rhev +3 | 10:2.6.0-28.el7_3.9 | RHSA-2017:0982 |
| Red Hat OpenStack 6 | qemu-img-rhev +3 | 10:2.6.0-28.el7_3.9 | RHSA-2017:0981 |
| Red Hat OpenStack 5 | qemu-img-rhev +2 | 2:0.12.1.2-2.503.el6_9.3 | RHSA-2017:1441, RHSA-2017:0980 |
| Red Hat OpenStack 5 | qemu-kvm-tools-rhev +1 | 10:2.6.0-28.el7_3.9 | RHSA-2017:0980 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | qemu | 2.6.2-41.16.1 | SUSE-SU-2017:1774-1 |
| SLES 12 SP2 | xen | 4.7.2_04-39.1 | SUSE-SU-2017:2326-1, SUSE-SU-2017:1143-1 |
| SLES 12 SP1 | qemu | 2.3.1-33.3.3 | SUSE-SU-2017:2946-1 |
| SLES 12 SP1 | xen | 4.5.5_10-22.14.1 | SUSE-SU-2017:1147-1 |
| SLES 12 | qemu | 2.0.2-48.34.3 | SUSE-SU-2017:2969-1 |
| SLES 12 | xen | 4.4.4_16-22.36.1 | SUSE-SU-2017:1080-1 |
| SLES 11 SP4 | kvm | 1.4.2-60.3.1 | SUSE-SU-2017:2963-1 |
| SLES 11 SP4 | xen | 4.4.4_16-54.1 | SUSE-SU-2017:1145-1, SUSE-SU-2017:1081-1 |
| SLES 11 SP3 | kvm | 1.4.2-53.11.1 | SUSE-SU-2017:3084-1 |
| SLES 11 SP3 | xen | 4.2.5_21-41.1 | SUSE-SU-2017:1146-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | qemu | 2.6.2-41.16.1 | SUSE-SU-2017:1774-1 |
| SLES for SAP 12 SP2 | xen | 4.7.2_04-39.1 | SUSE-SU-2017:2326-1, SUSE-SU-2017:1143-1 |
| SLES for SAP 12 SP1 | qemu | 2.3.1-33.3.3 | SUSE-SU-2017:2946-1 |
| SLES for SAP 12 SP1 | xen | 4.5.5_10-22.14.1 | SUSE-SU-2017:1147-1 |
| SLES for SAP 12 | xen | 4.4.4_16-22.36.1 | SUSE-SU-2017:1080-1 |
| SLES for SAP 11 SP4 | kvm | 1.4.2-60.3.1 | SUSE-SU-2017:2963-1 |
| SLES for SAP 11 SP4 | xen | 4.4.4_16-54.1 | SUSE-SU-2017:1145-1, SUSE-SU-2017:1081-1 |
| SUSE OpenStack Cloud 6 | qemu | 2.3.1-33.3.3 | SUSE-SU-2017:2946-1 |
| SUSE OpenStack Cloud 5 | xen | 4.2.5_21-41.1 | SUSE-SU-2017:1146-1 |
| SUSE Manager Proxy 2.1 | xen | 4.2.5_21-41.1 | SUSE-SU-2017:1146-1 |
| SUSE Manager 2.1 | xen | 4.2.5_21-41.1 | SUSE-SU-2017:1146-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kvm | 1.4.2-53.11.1 | SUSE-SU-2017:3084-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xen | 4.2.5_21-41.1 | SUSE-SU-2017:1146-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.7.2-r0 | — |
| Alpine v3.23 | xen | 4.7.2-r0 | — |
| Alpine v3.22 | xen | 4.7.2-r0 | — |
| Alpine v3.21 | xen | 4.7.2-r0 | — |
| Alpine v3.20 | xen | 4.7.2-r0 | — |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.7.2-r0 | — |
| Alpine v3.18 | xen | 4.7.2-r0 | — |
| Alpine v3.17 | xen | 4.7.2-r0 | — |
| Alpine v3.16 | xen | 4.7.2-r0 | — |
| Alpine v3.15 | xen | 4.7.2-r0 | — |
| Alpine v3.14 | xen | 4.7.2-r0 | — |
| Alpine v3.13 | xen | 4.7.2-r0 | — |
| Alpine v3.12 | xen | 4.7.2-r0 | — |
| Alpine v3.11 | xen | 4.7.2-r0 | — |
| Alpine v3.10 | xen | 4.7.2-r0 | — |
| Alpine v3.9 | xen | 4.7.2-r0 | — |
| Alpine v3.8 | xen | 4.7.2-r0 | — |
| Alpine v3.7 | xen | 4.7.2-r0 | — |
| Alpine v3.6 | xen | 4.7.2-r0 | — |
| Alpine v3.5 | xen | 4.7.2-r0 | — |
| Alpine v3.4 | xen | 4.6.3-r8 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | qemu-img +3 | 10:1.5.3-126.el7_3.6 | ELSA-2017-0987 |
Advisories 29
- RHSA-2017:1441 Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:1205 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:1206 Red Hat Security Advisory: qemu-kvm security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0988 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0985 Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0987 Red Hat Security Advisory: qemu-kvm security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0983 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0984 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0982 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0980 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0981 Red Hat Security Advisory: qemu-kvm-rhev security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- DLA-939-1 qemu-kvm - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1497-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1270-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1035-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3261-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:2326-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1081-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1774-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2969-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1080-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2963-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:3084-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1145-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1147-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:1143-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:1146-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2017:2946-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2017-0987 Important: qemu-kvm security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 18, 2017
References
- 96893 vdb-entry
- RHSA-2017:0983 vendor-advisory
- RHSA-2017:0982 vendor-advisory
- [debian-lts-announce] 20180906 [SECURITY] [DLA 1497-1] qemu security update mailing-list
- GLSA-201706-03 vendor-advisory
- RHSA-2017:1206 vendor-advisory
- 1038023 vdb-entry
- https://support.citrix.com/article/CTX221578
- RHSA-2017:0985 vendor-advisory
- RHSA-2017:0987 vendor-advisory
- RHSA-2017:0984 vendor-advisory
- [debian-lts-announce] 20180206 [SECURITY] [DLA 1270-1] xen security update mailing-list
- RHSA-2017:0988 vendor-advisory
- RHSA-2017:1441 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9603
- RHSA-2017:0981 vendor-advisory
- RHSA-2017:0980 vendor-advisory
- RHSA-2017:1205 vendor-advisory