CVE-2010-4255 — xen: 64-bit PV xen guest can crash host by accessing hypervisor per-domain memory area

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MEDIUM

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

Published Jan 25, 2011

6.1

MEDIUM

CVSS 2.0

EPSS 0.77%

Description

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.

Affected products

Product	Package	State	Advisory
Red Hat Enterprise Linux 5	kernel-0:2.6.18-238.el5	Fixed	RHSA-2011:0017

Remediation

No remediation recorded yet.

Metrics

0.77% 0.00768

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00768

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.77% (0.00768)	53.90th	v5 (v2026.06.15)
Jun 15, 2026	0.76% (0.00761)	50.34th	v5 (v2026.06.15)
Mar 17, 2025	0.82% (0.00819)	72.69th	v4 (v2025.03.14)
Dec 12, 2024	0.20% (0.00203)	59.15th	v3 (v2023.03.01)
Jun 14, 2024	0.20% (0.00203)	58.44th	v3 (v2023.03.01)
Mar 7, 2023	0.20% (0.00203)	56.41th	v3 (v2023.03.01)
Mar 6, 2023	1.54% (0.01537)	74.52th	v2 (v2022.01.01)
Feb 23, 2023	1.54% (0.01537)	74.48th	v2 (v2022.01.01)
Apr 1, 2022	1.54% (0.01537)	72.41th	v2 (v2022.01.01)
Feb 4, 2022	1.54% (0.01537)	51.33th	v2 (v2022.01.01)

Weaknesses (0)

No CWE recorded.

References (12)

http://lists.xensource.com/archives/html/xen-devel/2010-11/msg01650.html
mailing-listx_refsource_MLISTPatch
http://openwall.com/lists/oss-security/2010/11/30/5
mailing-listx_refsource_MLISTPatch
http://openwall.com/lists/oss-security/2010/11/30/8
mailing-listx_refsource_MLISTPatch
http://secunia.com/advisories/42884
third-party-advisoryx_refsource_SECUNIA
http://secunia.com/advisories/46397
third-party-advisoryx_refsource_SECUNIA
http://www.redhat.com/support/errata/RHSA-2011-0017.html
vendor-advisoryx_refsource_REDHAT
http://www.securityfocus.com/archive/1/520102/100/0/threaded
mailing-listx_refsource_BUGTRAQ
http://www.vmware.com/security/advisories/VMSA-2011-0012.html
x_refsource_CONFIRM
https://access.redhat.com/security/cve/CVE-2010-4255
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=658155
x_refsource_CONFIRMPatchIssue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2010-4255
https://www.cve.org/CVERecord?id=CVE-2010-4255

Link	Providers	Tags
http://lists.xensource.com/archives/html/xen-devel/2010-11/msg01650.html		mailing-listx_refsource_MLISTPatch
http://openwall.com/lists/oss-security/2010/11/30/5		mailing-listx_refsource_MLISTPatch
http://openwall.com/lists/oss-security/2010/11/30/8		mailing-listx_refsource_MLISTPatch
http://secunia.com/advisories/42884		third-party-advisoryx_refsource_SECUNIA
http://secunia.com/advisories/46397		third-party-advisoryx_refsource_SECUNIA
http://www.redhat.com/support/errata/RHSA-2011-0017.html		vendor-advisoryx_refsource_REDHAT
http://www.securityfocus.com/archive/1/520102/100/0/threaded		mailing-listx_refsource_BUGTRAQ
http://www.vmware.com/security/advisories/VMSA-2011-0012.html		x_refsource_CONFIRM
https://access.redhat.com/security/cve/CVE-2010-4255		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=658155		x_refsource_CONFIRMPatchIssue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2010-4255
https://www.cve.org/CVERecord?id=CVE-2010-4255