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Vulnerabilities

Vulnerability · CVE-2011-4600

The networkReloadIptablesRules function in network/bridge_driver.c in libvirt before 0.9.9 does not properly handle firewall rules on bridge networks when libvirtd is restarted, wh

Published Apr 14, 2016 · catalog updated Oct 23, 2026 · The networkReloadIptablesRules function in

Check if you run it

No confirmed exploitation is on record for CVE-2011-4600. EPSS is 1.78%. Act only if a listed version of The networkReloadIptablesRules function in is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The networkReloadIptablesRules function in).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.78%
Remediation
Advisory link
Affected products
Debian:12 libvirt · Debian:13 libvirt · Debian:14 libvirt

The networkReloadIptablesRules function in network/bridge_driver.c in libvirt before 0.9.9 does not properly handle firewall rules on bridge networks when libvirtd is restarted, which might allow remote attackers to bypass intended access restrictions via a (1) DNS or (2) DHCP query.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 libvirt0 → 0.9.9-1
  • Debian:13 libvirt0 → 0.9.9-1
  • Debian:14 libvirt0 → 0.9.9-1

How to fix CVE-2011-4600

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2011-4600. EPSS is 1.78%. Act only if a listed version of The networkReloadIptablesRules function in is installed.

Which versions are affected?

Compare what you have installed with 0 → 0.9.9-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 1.78%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 14, 2016 · OpenSSF OSV / OSV Scanner

    Detected

    The networkReloadIptablesRules function in network/bridge_driver.c in libvirt before 0.9.9 does not properly handle firewall rules on bridge networks when libvirtd is restarted, which might allow remote attackers to bypass intended access restrictions via a (1) DNS or (2) DHCP query.

  2. Oct 23, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    libvirt fixed in 0.9.9-1; libvirt fixed in 0.9.9-1; libvirt fixed in 0.9.9-1

  3. Oct 23, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    libvirt fixed in 0.9.9-1

  4. Oct 23, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    The networkReloadIptablesRules function in network/bridge_driver.c in libvirt before 0.9.9 does not properly handle firewall rules on bridge networks when libvirtd is restarted, which might allow remote attackers to bypass intended access restrictions via a (1) DNS or (2) DHCP query.

Sources

  • CVE.orgVulnerability recordCVE-2011-4600

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2011-4600

    30-day exploitation probability 1.78%

    first.org
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2011-4600
    osv.dev
  • Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2011-4600

    The networkReloadIptablesRules function in network/bridge_driver.c in libvirt before 0.9.9 does not properly handle firewall rules on bridge networks when libvirtd is restarted, which might allow remote attackers to bypass intended access restrictions via a (1) DNS or (2) DHCP qu

    osv.dev

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.