CVE-2016-6888

Severity: medium (CVSS 4.4 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: 2016-12-10 · updated 2026-06-17
Weakness: CWE-190

Description

Integer overflow in the net_tx_pkt_init function in hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU process crash) via the maximum fragmentation count, which triggers an unchecked multiplication and NULL pointer dereference.

Affected products

Debian Linux: 8.0
QEMU: through 2.6.2; 2.7.0-rc0, 2.7.0-rc1, 2.7.0-rc2, 2.7.0-rc3
OpenStack: 6.0, 7.0, 8, 9, 10, 11
RedHat Virtualization: 4.0

References

http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=47882fa4975bf0b58dd74474329fdd7154e8f04c
http://www.openwall.com/lists/oss-security/2016/08/19/10
http://www.openwall.com/lists/oss-security/2016/08/19/6
http://www.securityfocus.com/bid/92556
https://access.redhat.com/errata/RHSA-2017:2392
https://access.redhat.com/errata/RHSA-2017:2408
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg03176.html
https://security.gentoo.org/glsa/201609-01
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=47882fa4975bf0b58dd74474329fdd7154e8f04c
http://www.openwall.com/lists/oss-security/2016/08/19/10
http://www.openwall.com/lists/oss-security/2016/08/19/6

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