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Fencer Intel
low 2.1

CVE-2012-4537 json

Xen 3.4 through 4.2, and possibly earlier versions, does not properly synchronize the p2m and m2p tables when the set_p2m_entry function fa…

published 2012-11-21 13 y ago modified 2026-06-16 4 mo ago also EUVD-2012-4465

cvss
2.1
version 2.0, 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

Xen 3.4 through 4.2, and possibly earlier versions, does not properly synchronize the p2m and m2p tables when the set_p2m_entry function fails, which allows local HVM guest OS administrators to cause a denial of service (memory consumption and assertion failure), aka "Memory mapping failure DoS vulnerability."

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.1.3-4

debian advisories DEBIAN-CVE-2012-4537

  • kernel RHEL 5 2.6.18-308.24.1.el5
  • kernel-PAE RHEL 5 2.6.18-308.24.1.el5
  • kernel-xen RHEL 5 2.6.18-308.24.1.el5
  • kernel-kdump RHEL 5 2.6.18-308.24.1.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-308.24.1.el5

red hat advisories RHSA-2012:1540

  • xen openSUSE Tumbleweed 4.7.0_12-1.3

opensuse advisories openSUSE-SU-2024:10196-1

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-2012-4537 updated cvss 5.5

kernel: xen: Memory mapping failure can crash Xen

  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-308.24.1.el5, kernel-PAE 2.6.18-308.24.1.el5, kernel-xen 2.6.18-308.24.1.el5, kernel-kdump 2.6.18-308.24.1.el5, kernel-debuginfo-common 2.6.18-308.24.1.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-308.24.1.el5, kernel-PAE 2.6.18-308.24.1.el5, kernel-xen 2.6.18-308.24.1.el5, kernel-kdump 2.6.18-308.24.1.el5, kernel-debuginfo-common 2.6.18-308.24.1.el5
    fixed: vendor fix RHSA-2012:1540

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, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

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.