CVE-2015-6855

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-11-06 · updated 2026-06-17
Weakness: CWE-369

Description

hw/ide/core.c in QEMU does not properly restrict the commands accepted by an ATAPI device, which allows guest users to cause a denial of service or possibly have unspecified other impact via certain IDE commands, as demonstrated by a WIN_READ_NATIVE_MAX command to an empty drive, which triggers a divide-by-zero error and instance crash.

Affected products

Arista Networks EOS: all versions
Canonical Ubuntu Linux: 12.04, 14.04, 15.04
Debian Linux: 7.0, 8.0, 9.0
Fedoraproject Fedora: 21, 22, 23
QEMU: through 2.4.1
SUSE Linux Enterprise Server 15 SP1: 12
SUSE Linux Enterprise Server: 12

References

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168602.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169036.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169039.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169327.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169341.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-September/167369.html
http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00019.html
http://www.debian.org/security/2015/dsa-3361
http://www.debian.org/security/2015/dsa-3362
http://www.openwall.com/lists/oss-security/2015/09/10/1
http://www.openwall.com/lists/oss-security/2015/09/10/2
http://www.securityfocus.com/bid/76691

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