Description
The cirrus_do_copy function in hw/display/cirrus_vga.c in QEMU (aka Quick Emulator), when cirrus graphics mode is VGA, allows local guest OS privileged users to cause a denial of service (divide-by-zero error and QEMU process crash) via vectors involving blit pitch values.
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-1 | — |
| Debian 13 | qemu | 1:2.8+dfsg-1 | — |
| Debian 12 | qemu | 1:2.8+dfsg-1 | — |
| Debian 8 | qemu | 1:2.1+dfsg-12+deb8u7 | DLA-1497-1 |
| Debian 7 | qemu +1 | 1.1.2+dfsg-6+deb7u19 | DLA-765-1, DLA-764-1 |
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 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | qemu-img-rhev +3 | 10:2.9.0-14.el7 | RHSA-2017:2392 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 11 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
| Red Hat OpenStack 10 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
| Red Hat OpenStack 9 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
| Red Hat OpenStack 8 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
| Red Hat OpenStack 7 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
| Red Hat OpenStack 6 | qemu-img-rhev +3 | 10:2.9.0-10.el7 | RHSA-2017:2408 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | qemu | 2.6.2-39.1 | SUSE-SU-2017:0625-1, SUSE-SU-2017:0127-1 |
| SLES 12 SP2 | xen | 4.7.1_06-31.1 | SUSE-SU-2017:0571-1 |
| SLES 12 SP1 | qemu | 2.3.1-32.11 | SUSE-SU-2017:1241-1 |
| SLES 12 SP1 | xen | 4.5.5_06-22.11.2 | SUSE-SU-2017:0570-1 |
| SLES 12 | qemu | 2.0.2-48.31.1 | SUSE-SU-2017:0661-1 |
| SLES 12 | xen | 4.4.4_14-22.33.1 | SUSE-SU-2017:0582-1 |
| SLES 11 SP4 | kvm | 1.4.2-59.1 | SUSE-SU-2017:1135-1 |
| SLES 11 SP4 | xen | 4.4.4_14-51.1 | SUSE-SU-2017:0647-1 |
| SLES 11 SP3 | kvm | 1.4.2-53.11.1 | SUSE-SU-2017:3084-1 |
| SLES 11 SP3 | xen | 4.2.5_21-35.1 | SUSE-SU-2017:0718-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | qemu | 2.6.2-39.1 | SUSE-SU-2017:0625-1, SUSE-SU-2017:0127-1 |
| SLES for SAP 12 SP2 | xen | 4.7.1_06-31.1 | SUSE-SU-2017:0571-1 |
| SLES for SAP 12 SP1 | qemu | 2.3.1-32.11 | SUSE-SU-2017:1241-1 |
| SLES for SAP 12 SP1 | xen | 4.5.5_06-22.11.2 | SUSE-SU-2017:0570-1 |
| SLES for SAP 12 | qemu | 2.0.2-48.31.1 | SUSE-SU-2017:0661-1 |
| SLES for SAP 12 | xen | 4.4.4_14-22.33.1 | SUSE-SU-2017:0582-1 |
| SLES for SAP 11 SP4 | kvm | 1.4.2-59.1 | SUSE-SU-2017:1135-1 |
| SLES for SAP 11 SP4 | xen | 4.4.4_14-51.1 | SUSE-SU-2017:0647-1 |
| SUSE OpenStack Cloud 5 | xen | 4.2.5_21-35.1 | SUSE-SU-2017:0718-1 |
| SUSE Manager Proxy 2.1 | xen | 4.2.5_21-35.1 | SUSE-SU-2017:0718-1 |
| SUSE Manager 2.1 | xen | 4.2.5_21-35.1 | SUSE-SU-2017:0718-1 |
| 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_21-35.1 | SUSE-SU-2017:0718-1 |
Advisories 17
- RHSA-2017:2392 Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:2408 Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DLA-765-1 qemu-kvm - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-764-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1497-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3261-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:0661-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0127-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0582-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0570-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0647-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0718-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0625-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0571-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1241-1 Security update for qemu 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-2017:1135-1 Security update for kvm SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [qemu-devel] 20161205 [PULL 4/4] display: cirrus: check vga bits per pixel(bpp) value mailing-list
- [debian-lts-announce] 20180906 [SECURITY] [DLA 1497-1] qemu security update mailing-list
- RHSA-2017:2392 vendor-advisory
- 94803 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1334398
- http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=4299b90e9ba9ce5ca9024572804ba751aa1a7e70
- RHSA-2017:2408 vendor-advisory
- [oss-security] 20161209 Re: CVE request Qemu: display: cirrus_vga: a divide by zero in cirrus_do_copy mailing-list