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Fencer Intel
medium 5.0

CVE-2012-4423 json

The virNetServerProgramDispatchCall function in libvirt before 0.10.2 allows remote attackers to cause a denial of service (NULL pointer de…

published 2012-11-19 13 y ago modified 2026-06-16 4 mo ago also EUVD-2012-4358

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

The virNetServerProgramDispatchCall function in libvirt before 0.10.2 allows remote attackers to cause a denial of service (NULL pointer dereference and segmentation fault) via an RPC call with (1) an event as the RPC number or (2) an RPC number whose value is in a "gap" in the RPC dispatch table.

Patch / fix

  • libvirt Debian 14, Debian 13, Debian 12 0.9.12-5

debian advisories DEBIAN-CVE-2012-4423

  • libvirt RHEL 6 0.9.10-21.el6_3.5
  • libvirt-client RHEL 6 0.9.10-21.el6_3.5
  • libvirt-python RHEL 6 0.9.10-21.el6_3.5
  • libvirt-lock-sanlock RHEL 6 0.9.10-21.el6_3.5

red hat advisories RHSA-2012:1359

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-2012-4423 updated cvss 3.3

libvirt: null function pointer invocation in virNetServerProgramDispatchCall()

  • Red Hat Enterprise Linux Desktop (v. 6) libvirt 0.9.10-21.el6_3.5, libvirt-client 0.9.10-21.el6_3.5, libvirt-python 0.9.10-21.el6_3.5 Red Hat Enterprise Linux Desktop Optional (v. 6) libvirt 0.9.10-21.el6_3.5, libvirt-lock-sanlock 0.9.10-21.el6_3.5 Red Hat Enterprise Linux HPC Node (v. 6) libvirt 0.9.10-21.el6_3.5, libvirt-client 0.9.10-21.el6_3.5, libvirt-python 0.9.10-21.el6_3.5 Red Hat Enterprise Linux HPC Node Optional (v. 6) libvirt 0.9.10-21.el6_3.5, libvirt-lock-sanlock 0.9.10-21.el6_3.5 Red Hat Enterprise Linux Server (v. 6) libvirt 0.9.10-21.el6_3.5, libvirt-client 0.9.10-21.el6_3.5, libvirt-python 0.9.10-21.el6_3.5 Red Hat Enterprise Linux Server Optional (v. 6) libvirt 0.9.10-21.el6_3.5, libvirt-lock-sanlock 0.9.10-21.el6_3.5
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) libvirt 0.9.10-21.el6_3.5, libvirt-client 0.9.10-21.el6_3.5, libvirt-python 0.9.10-21.el6_3.5 Red Hat Enterprise Linux Workstation Optional (v. 6) libvirt 0.9.10-21.el6_3.5, libvirt-lock-sanlock 0.9.10-21.el6_3.5
    fixed: vendor fix RHSA-2012:1359
  • Red Hat Enterprise Linux 5 libvirt
    not affected: vulnerable code not present

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

3.72% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

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

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.