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Fencer Vulns
medium 5.5

CVE-2017-18043 json

Integer overflow in the macro ROUND_UP (n, d) in Quick Emulator (Qemu) allows a user to cause a denial of service (Qemu process crash).

published 2018-01-31 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-9183

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

Integer overflow in the macro ROUND_UP (n, d) in Quick Emulator (Qemu) allows a user to cause a denial of service (Qemu process crash).

Patch / fix

  • qemu Debian 14, Debian 13, Debian 12 1:2.10.0+dfsg-2

debian advisories DEBIAN-CVE-2017-18043

  • qemu Ubuntu 14.04 LTS 2.0.0+dfsg-2ubuntu1.39
  • qemu Ubuntu 16.04 LTS 1:2.5+dfsg-5ubuntu10.22

ubuntu advisories UBUNTU-CVE-2017-18043

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 SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 2.6.2-41.37.1
  • qemu SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 2.9.1-6.12.1

suse advisories SUSE-SU-2018:0831-1SUSE-SU-2018:0762-1

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-2017-18043 updated cvss 2.8

Qemu: integer overflow in ROUND_UP macro could result in DoS

  • Red Hat Enterprise Linux 6 qemu-img, qemu-kvm, qemu-kvm-tools, qemu-guest-agent, qemu-guest-agent-win32 Red Hat Enterprise Linux 7 qemu-img, qemu-kvm, libcacard, qemu-img-rhev, qemu-kvm-rhev, qemu-kvm-tools, +5 more Red Hat Enterprise Linux OpenStack Platform 6 (Juno) qemu-kvm-rhev Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) qemu-img-rhev, qemu-kvm-rhev, libcacard-rhev, qemu-kvm-tools-rhev, libcacard-devel-rhev, libcacard-tools-rhev, +1 more Red Hat OpenStack Platform 8 (Liberty) qemu-img-rhev, qemu-kvm-rhev, libcacard-rhev, qemu-kvm-tools-rhev, libcacard-devel-rhev, libcacard-tools-rhev, +1 more Red Hat OpenStack Platform 9 (Mitaka) qemu-img-rhev, qemu-kvm-rhev, libcacard-rhev, qemu-kvm-tools-rhev, libcacard-devel-rhev, libcacard-tools-rhev, +1 more
    +3 more products
    Red Hat OpenStack Platform 10 (Newton) qemu-img-rhev, qemu-kvm-rhev, qemu-kvm-tools-rhev, qemu-kvm-common-rhev Red Hat OpenStack Platform 11 (Ocata) qemu-kvm-rhev Red Hat OpenStack Platform 12 (Pike) qemu-img-rhev, qemu-kvm-rhev, qemu-kvm-tools-rhev, qemu-kvm-common-rhev
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 5 kvm, xen Red Hat Enterprise Linux 8 qemu-img, qemu-kvm, qemu-kvm-core, qemu-kvm-tests, qemu-kvm-common, qemu-guest-agent, +8 more
    not affected: vulnerable code not present

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

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns 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.