Skip to content
Fencer Intel
medium 6.1

CVE-2010-4255 json

The fixup_page_fault function in arch/x86/traps.c in Xen 4.0.1 and earlier on 64-bit platforms, when paravirtualization is enabled, does no…

published 2011-01-25 15 y ago modified 2026-06-16 4 mo ago also EUVD-2010-4228

cvss
6.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

The fixup_page_fault function in arch/x86/traps.c in Xen 4.0.1 and earlier on 64-bit platforms, when paravirtualization is enabled, does not verify that kernel mode is used to call the handle_gdt_ldt_mapping_fault function, which allows guest OS users to cause a denial of service (host OS BUG_ON) via a crafted memory access.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.0.1-2

debian advisories DEBIAN-CVE-2010-4255

  • kernel RHEL 5 2.6.18-238.el5
  • kernel-PAE RHEL 5 2.6.18-238.el5
  • kernel-xen RHEL 5 2.6.18-238.el5
  • kernel-kdump RHEL 5 2.6.18-238.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-238.el5

red hat advisories RHSA-2011:0017

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-2010-4255 updated cvss 6.1

xen: 64-bit PV xen guest can crash host by accessing hypervisor per-domain memory area

  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-238.el5, kernel-PAE 2.6.18-238.el5, kernel-xen 2.6.18-238.el5, kernel-kdump 2.6.18-238.el5, kernel-debuginfo-common 2.6.18-238.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-238.el5, kernel-PAE 2.6.18-238.el5, kernel-xen 2.6.18-238.el5, kernel-kdump 2.6.18-238.el5, kernel-debuginfo-common 2.6.18-238.el5
    fixed: vendor fix RHSA-2011:0017

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

0.77% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.1 AV:A/AC:L/Au:N/C:N/I:N/A:C

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.