CVE-2016-6834

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-120

Description

The net_tx_pkt_do_sw_fragmentation function in hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a zero length for the current fragment length.

Affected products

Debian Linux: 8.0
QEMU: through 2.6.2; 2.7.0-rc0, 2.7.0-rc1, 2.7.0-rc2

References

http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=ead315e43ea0c2ca3491209c6c8db8ce3f2bbe05
http://www.openwall.com/lists/oss-security/2016/08/11/8
http://www.openwall.com/lists/oss-security/2016/08/18/7
http://www.securityfocus.com/bid/92446
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01601.html
https://security.gentoo.org/glsa/201609-01
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=ead315e43ea0c2ca3491209c6c8db8ce3f2bbe05
http://www.openwall.com/lists/oss-security/2016/08/11/8
http://www.openwall.com/lists/oss-security/2016/08/18/7
http://www.securityfocus.com/bid/92446
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html

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