CVE-2018-12617

Name: CVE-2018-12617
Creator: NVD / NIST
Published: 2018-06-21T18:29:00.233+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 25.35%

Last modified Jun 17, 2026

CVE-2018-12617 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation fault when trying to allocate a large memory chunk. The vulnerability can be exploited by sending a crafted QMP command (including guest-file-read with a large count value) to the agent via the listening socket.. EPSS estimates a 25.35% chance of exploitation in the next 30 days.

Description

qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation fault when trying to allocate a large memory chunk. The vulnerability can be exploited by sending a crafted QMP command (including guest-file-read with a large count value) to the agent via the listening socket.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

25.35%

97.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Qemu	Qemu	<= 2.12.50
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	18.10
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0

References

http://www.securityfocus.com/bid/104531Third Party Advisory, VDB Entry
https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00041.htmlMailing List, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.htmlMailing List, Patch, Third Party Advisory
https://seclists.org/bugtraq/2019/May/76Mailing List, Third Party Advisory
https://usn.ubuntu.com/3826-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4454Third Party Advisory
https://www.exploit-db.com/exploits/44925/Exploit, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/104531Third Party Advisory, VDB Entry
https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00041.htmlMailing List, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.htmlMailing List, Patch, Third Party Advisory
https://seclists.org/bugtraq/2019/May/76Mailing List, Third Party Advisory
https://usn.ubuntu.com/3826-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4454Third Party Advisory
https://www.exploit-db.com/exploits/44925/Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Jun 21, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-12617?

How severe is CVE-2018-12617?

CVE-2018-12617 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 25.35% probability of exploitation in the next 30 days.

How do I fix CVE-2018-12617?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-12617?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST