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Fencer Intel
high 7.7

CVE-2011-1763 json

The get_free_port function in Xen allows local authenticated DomU users to cause a denial of service or possibly gain privileges via unspec…

published 2014-01-07 12 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1762

cvss
7.7
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

The get_free_port function in Xen allows local authenticated DomU users to cause a denial of service or possibly gain privileges via unspecified vectors involving a new event channel port.

Patch / fix

  • kernel RHEL 5 2.6.18-238.12.1.el5
  • kernel-PAE RHEL 5 2.6.18-238.12.1.el5
  • kernel-xen RHEL 5 2.6.18-238.12.1.el5
  • kernel-kdump RHEL 5 2.6.18-238.12.1.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-238.12.1.el5

red hat advisories RHSA-2011:0833

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-2011-1763 updated cvss 6.5

kernel: xen: improper upper boundary check in get_free_port() function

  • Red Hat Enterprise Linux (v. 5.6.z server) kernel 2.6.18-238.12.1.el5, kernel-PAE 2.6.18-238.12.1.el5, kernel-xen 2.6.18-238.12.1.el5, kernel-kdump 2.6.18-238.12.1.el5, kernel-debuginfo-common 2.6.18-238.12.1.el5
    fixed: vendor fix RHSA-2011:0833

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

0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.7 AV:A/AC:L/Au:S/C:C/I:C/A:C

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.