The fixup_page_fault function in arch/x86/traps.c in Xen 4.0.1 and earlier on 64-bit…
Priority LOW 29Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
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.
Why it matters now
EPSS 0.00768 55th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 19
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:citrix:xen:*:*:*:*:*:*:*:* | up to 4.0.1 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.0.2:*:*:*:*:*:*:* | 3.0.2 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.0.3:*:*:*:*:*:*:* | 3.0.3 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.0.4:*:*:*:*:*:*:* | 3.0.4 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.1.2:*:*:*:*:*:*:* | 3.1.2 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.1.3:*:*:*:*:*:*:* | 3.1.3 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.1.4:*:*:*:*:*:*:* | 3.1.4 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.2.0:*:*:*:*:*:*:* | 3.2.0 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.2.1:*:*:*:*:*:*:* | 3.2.1 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.2.2:*:*:*:*:*:*:* | 3.2.2 | Vulnerable | Citrix |
- cpe:2.3:a:citrix:xen:*:*:*:*:*:*:*:* Versions up to 4.0.1 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.0.2:*:*:*:*:*:*:* Versions 3.0.2 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.0.3:*:*:*:*:*:*:* Versions 3.0.3 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.0.4:*:*:*:*:*:*:* Versions 3.0.4 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.1.2:*:*:*:*:*:*:* Versions 3.1.2 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.1.3:*:*:*:*:*:*:* Versions 3.1.3 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.1.4:*:*:*:*:*:*:* Versions 3.1.4 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.2.0:*:*:*:*:*:*:* Versions 3.2.0 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.2.1:*:*:*:*:*:*:* Versions 3.2.1 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.2.2:*:*:*:*:*:*:* Versions 3.2.2 Vulnerable ·Citrix
Show 9 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:citrix:xen:3.2.3:*:*:*:*:*:*:* | 3.2.3 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.3.0:*:*:*:*:*:*:* | 3.3.0 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.3.1:*:*:*:*:*:*:* | 3.3.1 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.3.2:*:*:*:*:*:*:* | 3.3.2 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.4.0:*:*:*:*:*:*:* | 3.4.0 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.4.1:*:*:*:*:*:*:* | 3.4.1 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.4.2:*:*:*:*:*:*:* | 3.4.2 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:3.4.3:*:*:*:*:*:*:* | 3.4.3 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xen:4.0.0:*:*:*:*:*:*:* | 4.0.0 | Vulnerable | Citrix |
- cpe:2.3:a:citrix:xen:3.2.3:*:*:*:*:*:*:* Versions 3.2.3 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.3.0:*:*:*:*:*:*:* Versions 3.3.0 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.3.1:*:*:*:*:*:*:* Versions 3.3.1 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.3.2:*:*:*:*:*:*:* Versions 3.3.2 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.4.0:*:*:*:*:*:*:* Versions 3.4.0 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.4.1:*:*:*:*:*:*:* Versions 3.4.1 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.4.2:*:*:*:*:*:*:* Versions 3.4.2 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:3.4.3:*:*:*:*:*:*:* Versions 3.4.3 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xen:4.0.0:*:*:*:*:*:*:* Versions 4.0.0 Vulnerable ·Citrix
Remediation
Red Hat 1 advisory
- RHSA-2011:0017 Released 2011-01-13 · Red Hat rating ImportantRed Hat Enterprise Linux 5.6 kernel security and bug fix update
- Red Hat Enterprise Linux (v. 5 server) kernel-2.6.18-238.el5, kernel-2.6.18-238.el5.ia64, kernel-PAE-2.6.18-238.el5 +18
- Red Hat Enterprise Linux Desktop (v. 5 client) kernel-2.6.18-238.el5, kernel-PAE-2.6.18-238.el5, kernel-PAE-devel-2.6.18-238.el5 +8
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux (v. 5 server) | Fixed | RHSA-2011:0017 |
| Red Hat Enterprise Linux Desktop (v. 5 client) | Fixed | RHSA-2011:0017 |
Timeline
- 2026-10-02 Threatist record created from CVE-2010-4255
- 2026-10-03 Alias added: GHSA-3x4p-cw57-cgf8
References
Patch 4
- https://bugzilla.redhat.com/show_bug.cgi?id=658155
- [oss-security] 20101130 CVE request: xen: x86-64: don't crash Xen upon direct pv guest access
- [xen-devel] 20101129 [PATCH] x86-64: don't crash Xen upon direct pv guest access
- [oss-security] 20101130 Re: CVE request: xen: x86-64: don't crash Xen upon direct pv guest access
Advisory 1
More Citrix Xen vulnerabilities
- TI-2011-01674 Xen 4.1 before 4.1.1 and 4.0 before 4.0.2, when using PCI passthrough on Intel VT-d… CVSS 2.0HIGH 7.4
- TI-2008-04202 xend in Xen 3.0.3 does not properly limit the contents of the /local/domain xenstore… CVSS 2.0HIGH 7.2
- TI-2011-01402 Multiple integer overflows in tools/libxc/xc_dom_bzimageloader.c in Xen 3.2, 3.3, 4.0… CVSS 2.0MEDIUM 6.9
- TI-2008-05424 xend in Xen 3.3.0 does not properly restrict a guest VM's write access within the… CVSS 2.0HIGH 7.2
- TI-2010-03988 The vbd_create function in Xen 3.1.2, when the Linux kernel 2.6.18 on Red Hat Enterprise… CVSS 2.0MEDIUM 5.5
- TI-2010-03996 The do_block_io_op function in (1) drivers/xen/blkback/blkback.c and (2)… CVSS 2.0MEDIUM 5.5
Sources
- CVE-2010-4255 · CVE Program
- CVE-2010-4255 · NVD
- FIRST EPSS
- GHSA-3x4p-cw57-cgf8 · GitHub Advisory Database · CC BY 4.0
- CVE-2010-4255 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences