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Fencer Intel
high 7.5

CVE-2014-7840 json

The host_from_stream_offset function in arch_init.c in QEMU, when loading RAM during migration, allows remote attackers to execute arbitrar…

published 11y ago modified 4mo ago also EUVD-2014-7694

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.1%
EPSS 4.1% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

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.

Patch / fix

  • qemu Debian 14, Debian 13, Debian 12 2.1+dfsg-8

debian advisories DEBIAN-CVE-2014-7840

  • qemu Ubuntu 14.04 LTS 2.0.0+dfsg-2ubuntu1.9

ubuntu advisories UBUNTU-CVE-2014-7840

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • qemu-kvm-rhev RHEL 7 10:2.1.2-23.el7
  • qemu-img-rhev RHEL 7 10:2.1.2-23.el7
  • libcacard-rhev RHEL 7 10:2.1.2-23.el7
  • qemu-kvm-tools-rhev RHEL 7 10:2.1.2-23.el7
  • libcacard-devel-rhev RHEL 7 10:2.1.2-23.el7
  • libcacard-tools-rhev RHEL 7 10:2.1.2-23.el7
  • qemu-kvm-common-rhev RHEL 7 10:2.1.2-23.el7
  • qemu-kvm RHEL 7 10:1.5.3-86.el7

red hat advisories RHSA-2015:0624RHSA-2015:0349

  • qemu SLES for SAP 12, SLES 12, SLED 12 2.0.2-42.1

suse advisories SUSE-SU-2015:0349-1

Is CVE-2014-7840 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2014-7840 updated cvss 3.7

qemu: insufficient parameter validation during ram load

  • Red Hat Enterprise Linux 5 kvm
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 6 qemu-img, qemu-kvm, qemu-kvm-tools, qemu-guest-agent, qemu-guest-agent-win32
    affected: no fix available
  • Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) qemu-kvm-rhev Red Hat OpenStack Platform 3 qemu-kvm-rhev Red Hat OpenStack Platform 4 qemu-kvm-rhev
    under investigation
  • Red Hat Enterprise Linux Client (v. 7) qemu-img 1.5.3-86.el7, qemu-kvm 1.5.3-86.el7, libcacard 1.5.3-86.el7, qemu-kvm-tools 1.5.3-86.el7, qemu-kvm-common 1.5.3-86.el7 Red Hat Enterprise Linux Client Optional (v. 7) libcacard-tools 1.5.3-86.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) qemu-img 1.5.3-86.el7, qemu-kvm 1.5.3-86.el7, libcacard 1.5.3-86.el7, qemu-kvm-tools 1.5.3-86.el7, libcacard-tools 1.5.3-86.el7, qemu-kvm-common 1.5.3-86.el7 Red Hat Enterprise Linux Server (v. 7) qemu-img 1.5.3-86.el7, qemu-kvm 1.5.3-86.el7, libcacard 1.5.3-86.el7, qemu-kvm-tools 1.5.3-86.el7, qemu-kvm-common 1.5.3-86.el7 Red Hat Enterprise Linux Server Optional (v. 7) libcacard 1.5.3-86.el7, libcacard-tools 1.5.3-86.el7 Red Hat Enterprise Linux Workstation (v. 7) qemu-img 1.5.3-86.el7, qemu-kvm 1.5.3-86.el7, libcacard 1.5.3-86.el7, qemu-kvm-tools 1.5.3-86.el7, qemu-kvm-common 1.5.3-86.el7
    +1 more products
    Red Hat Enterprise Linux Workstation Optional (v. 7) libcacard-tools 1.5.3-86.el7
    fixed: vendor fix RHSA-2015:0349
  • Red Hat RHEV-H and VDSM for 7 Hosts qemu-img-rhev 2.1.2-23.el7, qemu-kvm-rhev 2.1.2-23.el7, libcacard-rhev 2.1.2-23.el7, qemu-kvm-tools-rhev 2.1.2-23.el7, libcacard-devel-rhev 2.1.2-23.el7, libcacard-tools-rhev 2.1.2-23.el7, +1 more
    fixed: vendor fix RHSA-2015:0624

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.12% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.