What is CVE-2015-5158?

CVE-2015-5158 is a medium-severity vulnerability in Qemu, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2016-04-12.

How severe is CVE-2015-5158?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Qemu

CVE-2015-5158

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.

Vulnerability class: Buffer Overflow

Published 2016-04-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (35.4th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Qemu — versions 2.4.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.securityfocus.com/bid/76016 (VDB Entry, Third Party Advisory, vdb-entry)
lists.nongnu.org/archive/html/qemu-devel/2015-07/msg04558.html (mailing-list, Mailing List, Third Party Advisory)
security.gentoo.org/glsa/201510-02 (vendor-advisory, Third Party Advisory)
www.securitytracker.com/id/1033095 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2015-5158?: CVE-2015-5158 is a medium-severity vulnerability in Qemu, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2016-04-12.
How severe is CVE-2015-5158?: Medium severity. CVSS v3 base score is 5.5 out of 10.