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Fencer Intel
medium 6.1

CVE-2011-1780 json

The instruction emulation in Xen 3.0.3 allows local SMP guest users to cause a denial of service (host crash) by replacing the instruction…

published 2014-01-07 12 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1778

cvss
6.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

The instruction emulation in Xen 3.0.3 allows local SMP guest users to cause a denial of service (host crash) by replacing the instruction that causes the VM to exit in one thread with a different instruction in a different thread.

Patch / fix

  • kernel RHEL 5 2.6.18-238.21.1.el5
  • kernel-PAE RHEL 5 2.6.18-238.21.1.el5
  • kernel-xen RHEL 5 2.6.18-238.21.1.el5
  • kernel-kdump RHEL 5 2.6.18-238.21.1.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-238.21.1.el5
  • kernel RHEL 5 2.6.18-274.el5
  • kernel-PAE RHEL 5 2.6.18-274.el5
  • kernel-xen RHEL 5 2.6.18-274.el5

red hat advisories RHSA-2011:1163RHSA-2011:1065

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-2011-1780 updated cvss 6.1

kernel: xen: svm: insufficiencies in handling emulated instructions during vm exits

  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-274.el5, kernel-PAE 2.6.18-274.el5, kernel-xen 2.6.18-274.el5, kernel-kdump 2.6.18-274.el5, kernel-debuginfo-common 2.6.18-274.el5
    fixed: vendor fix RHSA-2011:1065
  • Red Hat Enterprise Linux (v. 5.6.z server) kernel 2.6.18-238.21.1.el5, kernel-PAE 2.6.18-238.21.1.el5, kernel-xen 2.6.18-238.21.1.el5, kernel-kdump 2.6.18-238.21.1.el5, kernel-debuginfo-common 2.6.18-238.21.1.el5
    fixed: vendor fix RHSA-2011:1163
  • Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-274.el5, kernel-PAE 2.6.18-274.el5, kernel-xen 2.6.18-274.el5, kernel-kdump 2.6.18-274.el5, kernel-debuginfo-common 2.6.18-274.el5
    fixed: vendor fix RHSA-2011:1065

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

0.70% chance of exploitation in the next 30 days, higher than 53% 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

Classification

Weakness
  • CWE-20 Improper Input Validation

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.