CVE-2015-5158

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: 2016-04-12 · updated 2026-06-17
Weakness: CWE-787

Description

Stack-based buffer overflow in hw/scsi/scsi-bus.c in QEMU, when built with SCSI-device emulation support, allows guest OS users with CAP_SYS_RAWIO permissions to cause a denial of service (instance crash) via an invalid opcode in a SCSI command descriptor block.

Affected products

QEMU: from 2.2.0 before 2.4.0; 2.4.0, 2.4.0-rc1, 2.4.0-rc2 — fixed in 2.4.0

How to fix

Upgrade to a fixed version: QEMU 2.4.0. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/76016
http://www.securitytracker.com/id/1033095
https://lists.nongnu.org/archive/html/qemu-devel/2015-07/msg04558.html
https://security.gentoo.org/glsa/201510-02
http://www.securityfocus.com/bid/76016
http://www.securitytracker.com/id/1033095
https://lists.nongnu.org/archive/html/qemu-devel/2015-07/msg04558.html
https://security.gentoo.org/glsa/201510-02

Get alerted when CVE-2015-5158 or the next vulnerability affects your stack