CVE-2017-1000256: High severity redhat libvirt vulnerability
Last updated 25 August 2025
Other sources
libvirt version 2.3.0 and later is vulnerable to a bad default configuration of "verify-peer=no" passed to QEMU by libvirt resulting in a failure to validate SSL/TLS certificates by default.
— Launchpad
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2017-1000256?
CVE-2017-1000256 is a vulnerability in libvirt version 2.3.0 and later that allows SSL/TLS certificate validation to fail.
How does CVE-2017-1000256 affect libvirt?
CVE-2017-1000256 affects libvirt by having a bad default configuration of verify-peer=no, which results in a failure to validate SSL/TLS certificates by default.
Which versions of libvirt are affected by CVE-2017-1000256?
libvirt versions 2.3.0 to 3.9.0 are affected by CVE-2017-1000256.
What is the severity of CVE-2017-1000256?
CVE-2017-1000256 has a severity rating of 8.1, classified as high.
How can I fix CVE-2017-1000256?
To fix CVE-2017-1000256, you should upgrade to a version of libvirt that is not affected by the vulnerability.