CVEvulnerability

CVE-2010-4255

6.1 MEDIUM Published 2011-01-25 Modified 2026-06-16 Official page ↗
Status
Modified
Published
2011-01-25
Last modified
2026-06-16
Assigner
[email protected]
CVSS 2.0 ([email protected])
6.1 MEDIUM — AV:A/AC:L/Au:N/C:N/I:N/A:C

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 configurations

• citrix xen (<= 4.0.1) • citrix xen 3.0.2 • citrix xen 3.0.3 • citrix xen 3.0.4 • citrix xen 3.1.2 • citrix xen 3.1.3 • citrix xen 3.1.4 • citrix xen 3.2.0 • citrix xen 3.2.1 • citrix xen 3.2.2 • citrix xen 3.2.3 • citrix xen 3.3.0 • citrix xen 3.3.1 • citrix xen 3.3.2 • citrix xen 3.4.0 • citrix xen 3.4.1 • citrix xen 3.4.2 • citrix xen 3.4.3 • citrix xen 4.0.0

References