CVE-2014-7840

The host_from_stream_offset function in arch_init.c in QEMU, when loading RAM during migration, allows remote attackers to execute arbitrary code via a crafted (1) offset or (2) length value in savevm data.

Published: 2014-12-12 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-7840 is rated Moderate Risk (55/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.46%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2014-7840

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 6.77% 2.46% -4.32%
2 2025-03-29 2.46% 6.77% +4.32%
3 2025-03-17 — 2.46% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-7840

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2014-7840

OS Trackers for CVE-2014-7840

vendor priority summary link
debian low CVE-2014-7840 low priority: Debian including 1 source packages (qemu), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2014-7840
gentoo normal CVE-2014-7840: 1 GLSA(s) (201412-37), 1 atom(s) (app-emulation/qemu); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-7840
redhat medium — https://access.redhat.com/security/cve/CVE-2014-7840
suse medium CVE-2014-7840 severity moderate: SUSE including 556 source package names (kvm, kvm-1.4.2-0.21.4, …), 810 product×package rows across 60 product lines (HPE Helion OpenStack 8, SUSE Liberty Linux 7, … (60 product lines)): Fixed 702, Known Not Affected 108. https://www.suse.com/security/cve/CVE-2014-7840/
ubuntu low CVE-2014-7840 low priority: Ubuntu including 2 source packages (qemu, qemu-kvm), 10 status rows across 5 suites (lucid, precise, trusty, upstream, utopic): DNE 4, released 3, needs-triage 2, not-affected 1. https://ubuntu.com/security/CVE-2014-7840

Affected software / configurations for CVE-2014-7840

Vendor Product Version Raw CPE
qemu qemu <= 2.1.3 cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_eus 7.3 cpe:2.3:o:redhat:enterprise_linux_eus:7.3:*:*:*:*:*:*:*
redhat enterprise_linux_eus 7.4 cpe:2.3:o:redhat:enterprise_linux_eus:7.4:*:*:*:*:*:*:*
redhat enterprise_linux_eus 7.5 cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:*
redhat enterprise_linux_eus 7.6 cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_eus 7.7 cpe:2.3:o:redhat:enterprise_linux_eus:7.7:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.3 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.4 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.7 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
redhat virtualization 3.0 cpe:2.3:a:redhat:virtualization:3.0:*:*:*:*:*:*:*

References for CVE-2014-7840

cvelogic Threat Intelligence