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Fencer Vulns
medium 5.0

CVE-2009-1758 json

The hypervisor_callback function in Xen, possibly before 3.4.0, as applied to the Linux kernel 2.6.30-rc4, 2.6.18, and probably other versi…

published 2009-05-22 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1753

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

The hypervisor_callback function in Xen, possibly before 3.4.0, as applied to the Linux kernel 2.6.30-rc4, 2.6.18, and probably other versions allows guest user applications to cause a denial of service (kernel oops) of the guest OS by triggering a segmentation fault in "certain address ranges."

Patch / fix

  • kernel RHEL 4 2.6.9-89.0.3.EL
  • kernel-smp RHEL 4 2.6.9-89.0.3.EL
  • kernel-xenU RHEL 4 2.6.9-89.0.3.EL
  • kernel-hugemem RHEL 4 2.6.9-89.0.3.EL
  • kernel-largesmp RHEL 4 2.6.9-89.0.3.EL
  • kernel RHEL 5 2.6.18-128.1.14.el5
  • kernel-PAE RHEL 5 2.6.18-128.1.14.el5
  • kernel-xen RHEL 5 2.6.18-128.1.14.el5

red hat advisories RHSA-2009:1132RHSA-2009:1106

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-2009-1758 updated cvss 4.9

kernel: xen: local denial of service

  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-128.1.14.el5, kernel-PAE 2.6.18-128.1.14.el5, kernel-xen 2.6.18-128.1.14.el5, kernel-kdump 2.6.18-128.1.14.el5, kernel-debuginfo-common 2.6.18-128.1.14.el5
    fixed: vendor fix RHSA-2009:1106
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-89.0.3.EL, kernel-smp 2.6.9-89.0.3.EL, kernel-xenU 2.6.9-89.0.3.EL, kernel-hugemem 2.6.9-89.0.3.EL, kernel-largesmp 2.6.9-89.0.3.EL
    fixed: vendor fix RHSA-2009:1132
  • Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-128.1.14.el5, kernel-PAE 2.6.18-128.1.14.el5, kernel-xen 2.6.18-128.1.14.el5, kernel-kdump 2.6.18-128.1.14.el5, kernel-debuginfo-common 2.6.18-128.1.14.el5
    fixed: vendor fix RHSA-2009:1106
  • Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-89.0.3.EL, kernel-smp 2.6.9-89.0.3.EL, kernel-xenU 2.6.9-89.0.3.EL, kernel-hugemem 2.6.9-89.0.3.EL, kernel-largesmp 2.6.9-89.0.3.EL Red Hat Enterprise Linux ES version 4 kernel 2.6.9-89.0.3.EL, kernel-smp 2.6.9-89.0.3.EL, kernel-xenU 2.6.9-89.0.3.EL, kernel-hugemem 2.6.9-89.0.3.EL, kernel-largesmp 2.6.9-89.0.3.EL Red Hat Enterprise Linux WS version 4 kernel 2.6.9-89.0.3.EL, kernel-smp 2.6.9-89.0.3.EL, kernel-xenU 2.6.9-89.0.3.EL, kernel-hugemem 2.6.9-89.0.3.EL, kernel-largesmp 2.6.9-89.0.3.EL
    fixed: vendor fix RHSA-2009:1132

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

2.16% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • lists.xensource.com http://lists.xensource.com/archives/html/xen-devel/2009-05/msg00561.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-399 Resource Management Errors

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.