CVE-2021-4147
First published: Mon Dec 20 2021(Updated: )
A flaw was found in the libvirt libxl driver. A malicious guest could continuously reboot itself and cause libvirtd on the host to deadlock or crash, resulting in a denial of service condition.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libvirt | <2.33.0 | 2.33.0 |
| debian/libvirt | 7.0.0-3+deb11u3 9.0.0-4+deb12u1 10.7.0-3 | |
| LibVIRT | <2.33.0 | |
| Fedoraproject Fedora | =35 | |
| NetApp ONTAP Select Deploy |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=2034195
- https://security.netapp.com/advisory/ntap-20220513-0004/
- https://listman.redhat.com/archives/libvir-list/2021-November/msg00908.html
- https://gitlab.com/libvirt/libvirt/-/commit/23b51d7b8ec885e97a9277cf0a6c2833db4636e8
- https://gitlab.com/libvirt/libvirt/-/commit/a4e6fba069c0809b8b5dde5e9db62d2efd91b4a0
- https://gitlab.com/libvirt/libvirt/-/commit/e4f7589a3ec285489618ca04c8c0230cc31f3d99
- https://gitlab.com/libvirt/libvirt/-/commit/b9a5faea49b7412e26d7389af4c32fc2b3ee80e5
- https://gitlab.com/libvirt/libvirt/-/commit/5c5df5310f72be4878a71ace47074c54e0d1a27d
- https://gitlab.com/libvirt/libvirt/-/commit/a7a03324d86e111f81687b5315b8f296dde84340
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2034252
- https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
- https://launchpad.net/bugs/cve/CVE-2021-4147
- https://security-tracker.debian.org/tracker/CVE-2021-4147
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4147
- https://nvd.nist.gov/vuln/detail/CVE-2021-4147
- https://ubuntu.com/security/CVE-2021-4147
Frequently Asked Questions
What is CVE-2021-4147?
CVE-2021-4147 is a vulnerability in the libvirt libxl driver that could allow a malicious guest to continuously reboot itself and cause a denial of service on the host.
How severe is CVE-2021-4147?
CVE-2021-4147 has a severity rating of 6.5 out of 10.
Which software versions are affected by CVE-2021-4147?
The affected software versions of CVE-2021-4147 include libvirt versions 4.0.0-1ubuntu8.21, 6.0.0-0ubuntu8.16, 7.6.0-0ubuntu1.2, 7.10.0-2, and Redhat libvirt version 2.33.0.
How can I fix CVE-2021-4147?
To fix CVE-2021-4147, update libvirt to the recommended versions: 4.0.0-1ubuntu8.21, 6.0.0-0ubuntu8.16, 7.6.0-0ubuntu1.2, 7.10.0-2, or 2.33.0 for Redhat libvirt.
Where can I find more information about CVE-2021-4147?
You can find more information about CVE-2021-4147 in the following references: [Bugzilla Red Hat](https://bugzilla.redhat.com/show_bug.cgi?id=2034195), [NetApp Security Advisory](https://security.netapp.com/advisory/ntap-20220513-0004/), [Launchpad CVE](https://launchpad.net/bugs/cve/CVE-2021-4147).
- agent/type
- agent/first-publish-date
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-4147
- agent/software-canonical-lookup
- agent/severity
- agent/weakness
- agent/author
- collector/launchpad-cve
- source/Launchpad
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/usn-cve
- source/Ubuntu
- agent/remedy
- agent/references
- agent/description
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/trending
- agent/source
- collector/nvd-index
- agent/software-canonical-lookup-request
- collector/nvd-api
- source/NVD
- agent/softwarecombine
- agent/tags
- collector/nvd-cve
- package-manager/redhat
- package-manager/debian
- vendor/redhat
- canonical/libvirt
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/35
- vendor/netapp
- canonical/netapp ontap select deploy