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Fencer Intel
medium 4.9

CVE-2014-8867 json

The acceleration support for the "REP MOVS" instruction in Xen 4.4.x, 3.2.x, and earlier lacks properly bounds checking for memory mapped I…

published 11y ago modified 4mo ago also EUVD-2014-8697

cvss
4.9
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

The acceleration support for the "REP MOVS" instruction in Xen 4.4.x, 3.2.x, and earlier lacks properly bounds checking for memory mapped I/O (MMIO) emulated in the hypervisor, which allows local HVM guests to cause a denial of service (host crash) via unspecified vectors.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.4.1-5

debian advisories DEBIAN-CVE-2014-8867

  • xen Ubuntu 14.04 LTS 4.4.1-0ubuntu0.14.04.2

ubuntu advisories UBUNTU-CVE-2014-8867

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

  • kernel RHEL 5 2.6.18-404.el5
  • kernel-PAE RHEL 5 2.6.18-404.el5
  • kernel-xen RHEL 5 2.6.18-404.el5
  • kernel-kdump RHEL 5 2.6.18-404.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-404.el5

red hat advisories RHSA-2015:0783

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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-2014-8867 updated cvss 5.2

xen: Insufficient bounding of "REP MOVS" to MMIO emulated inside the hypervisor (xsa112)

  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-404.el5, kernel-PAE 2.6.18-404.el5, kernel-xen 2.6.18-404.el5, kernel-kdump 2.6.18-404.el5, kernel-debuginfo-common 2.6.18-404.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-404.el5, kernel-PAE 2.6.18-404.el5, kernel-xen 2.6.18-404.el5, kernel-kdump 2.6.18-404.el5, kernel-debuginfo-common 2.6.18-404.el5
    fixed: vendor fix RHSA-2015:0783

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

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness

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.