CVE-2016-9922

Severity: medium (CVSS 5.5 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: 2017-03-27 · updated 2026-06-17
Weakness: CWE-369

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.

Affected products

QEMU: through 2.7.1; 2.8.0-rc0, 2.8.0-rc1, 2.8.0-rc2

References

http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=4299b90e9ba9ce5ca9024572804ba751aa1a7e70
http://www.openwall.com/lists/oss-security/2016/12/09/1
http://www.securityfocus.com/bid/94803
https://access.redhat.com/errata/RHSA-2017:2392
https://access.redhat.com/errata/RHSA-2017:2408
https://bugzilla.redhat.com/show_bug.cgi?id=1334398
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
https://lists.gnu.org/archive/html/qemu-devel/2016-12/msg00442.html
http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=4299b90e9ba9ce5ca9024572804ba751aa1a7e70
http://www.openwall.com/lists/oss-security/2016/12/09/1
http://www.securityfocus.com/bid/94803
https://access.redhat.com/errata/RHSA-2017:2392

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