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Vulnerability record · CVE-2018-12617 · published 21 June 2018

CVE-2018-12617: Qemu integer overflow vulnerability

Qemu · Qemu

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.

7.5 CVSS 3.1 High EPSS 25% · top 2.1% CWE-190 · Integer overflow
7.5CVSS 3.1 base score, v2 5.0
25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
16References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/104531 Third Party AdvisoryVDB Entry
https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6 ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00041.html Mailing ListThird Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.html Mailing ListPatchThird Party Advisory
https://seclists.org/bugtraq/2019/May/76 Mailing ListThird Party Advisory
https://usn.ubuntu.com/3826-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4454 Third Party Advisory
https://www.exploit-db.com/exploits/44925/ ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/104531 Third Party AdvisoryVDB Entry
https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6 ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00041.html Mailing ListThird Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.html Mailing ListPatchThird Party Advisory
https://seclists.org/bugtraq/2019/May/76 Mailing ListThird Party Advisory
https://usn.ubuntu.com/3826-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4454 Third Party Advisory
https://www.exploit-db.com/exploits/44925/ ExploitThird Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2018-12617), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.