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Fencer Vulns
medium 4.6

CVE-2007-6416 json

The copy_to_user function in the PAL emulation functionality for Xen 3.1.2 and earlier, when running on ia64 systems, allows HVM guest user…

published 2007-12-17 18 y ago modified 2026-06-16 4 mo ago also EUVD-2007-6382

cvss
4.6
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

The copy_to_user function in the PAL emulation functionality for Xen 3.1.2 and earlier, when running on ia64 systems, allows HVM guest users to access arbitrary physical memory by triggering certain mapping operations.

Patch / fix

  • kernel RHEL 5 2.6.18-53.1.6.el5
  • kernel-PAE RHEL 5 2.6.18-53.1.6.el5
  • kernel-xen RHEL 5 2.6.18-53.1.6.el5
  • kernel-kdump RHEL 5 2.6.18-53.1.6.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-53.1.6.el5

red hat advisories RHSA-2008:0089

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-2007-6416 updated

Security: vulnerability of copy_to_user in PAL emulation

  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-53.1.6.el5, kernel-PAE 2.6.18-53.1.6.el5, kernel-xen 2.6.18-53.1.6.el5, kernel-kdump 2.6.18-53.1.6.el5, kernel-debuginfo-common 2.6.18-53.1.6.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-53.1.6.el5, kernel-PAE 2.6.18-53.1.6.el5, kernel-xen 2.6.18-53.1.6.el5, kernel-kdump 2.6.18-53.1.6.el5, kernel-debuginfo-common 2.6.18-53.1.6.el5
    fixed: vendor fix RHSA-2008:0089

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, 2026-11-08).

Exploits and checks

  • xenbits.xensource.com http://xenbits.xensource.com/ext/ia64/xen-unstable.hg?rev/e6069a715fd7 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Vulns 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.