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Fencer Intel
medium 5.2

CVE-2013-4494 json

Xen before 4.1.x, 4.2.x, and 4.3.x does not take the page_alloc_lock and grant_table.lock in the same order, which allows local guest admin…

published 13y ago modified 4mo ago also EUVD-2013-4356

cvss
5.2
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

Xen before 4.1.x, 4.2.x, and 4.3.x does not take the page_alloc_lock and grant_table.lock in the same order, which allows local guest administrators with access to multiple vcpus to cause a denial of service (host deadlock) via unspecified vectors.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.4.0-1

debian advisories DEBIAN-CVE-2013-4494

  • kernel RHEL 5 2.6.18-371.4.1.el5
  • kernel-PAE RHEL 5 2.6.18-371.4.1.el5
  • kernel-xen RHEL 5 2.6.18-371.4.1.el5
  • kernel-kdump RHEL 5 2.6.18-371.4.1.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-371.4.1.el5

red hat advisories RHSA-2014:0108

  • xen openSUSE Tumbleweed 4.7.0_12-1.3

opensuse advisories openSUSE-SU-2024:10196-1

Is CVE-2013-4494 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.

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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-2013-4494 updated cvss 4.3

kernel: xen: Lock order reversal between page allocation and grant table locks

  • Red Hat Enterprise Linux 5 kernel-xen
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-371.4.1.el5, kernel-PAE 2.6.18-371.4.1.el5, kernel-xen 2.6.18-371.4.1.el5, kernel-kdump 2.6.18-371.4.1.el5, kernel-debuginfo-common 2.6.18-371.4.1.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-371.4.1.el5, kernel-PAE 2.6.18-371.4.1.el5, kernel-xen 2.6.18-371.4.1.el5, kernel-debuginfo-common 2.6.18-371.4.1.el5
    fixed: vendor fix RHSA-2014:0108
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    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

0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.2 AV:A/AC:M/Au:S/C:N/I:N/A:C

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.