Skip to content
Fencer Vulns
medium 6.5

CVE-2020-10703 json

A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0, and fixed in libvirt 6.0.0, for…

published 2020-06-02 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-3134

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0, and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this flaw affects storage pools created without a target path such as network-based pools like gluster and RBD. Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon, resulting in a potential denial of service.

Patch / fix

  • redhat libvirt 6.0.0
  • libvirt Debian 14, Debian 13, Debian 12 6.0.0-2

debian advisories DEBIAN-CVE-2020-10703

  • libvirt Ubuntu 18.04 LTS 4.0.0-1ubuntu8.17

ubuntu advisories UBUNTU-CVE-2020-10703

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • SLOF RHEL 8 20191022-3.git899d9883.module+el8.3.0+6423+e4cb6418
  • hivex RHEL 8 1.3.18-20.module+el8.3.0+6423+e4cb6418
  • netcf RHEL 8 0.2.8-12.module+el8.1.0+4066+0f1aadab
  • libnbd RHEL 8 1.2.2-1.module+el8.3.0+7353+9de0a3cc
  • nbdkit RHEL 8 1.16.2-4.module+el8.3.0+6922+fd575af8
  • libvirt RHEL 8 6.0.0-28.module+el8.3.0+7827+5e65edd7
  • nbdfuse RHEL 8 1.2.2-1.module+el8.3.0+7353+9de0a3cc
  • seabios RHEL 8 1.13.0-2.module+el8.3.0+7353+9de0a3cc

red hat advisories RHSA-2020:4676RHSA-2020:4000

  • libvirt SLES for SAP 12 SP4, SLES 12 SP4, SLE Software Development Kit 12 SP4 4.0.0-8.20.2
  • libvirt SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 5.1.0-13.6.2
  • libvirt SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.0.0-9.32.1
  • libvirt SLE Module for Server Applications 15 SP1, SLE Module for Basesystem 15 SP1 5.1.0-8.16.1

suse advisories SUSE-SU-2020:1289-1SUSE-SU-2020:1277-1SUSE-SU-2020:1250-1SUSE-SU-2020:1208-1

  • hivex AlmaLinux 8 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
  • netcf AlmaLinux 8 0.2.8-12.module_el8.5.0+2608+72063365
  • netcf AlmaLinux 8 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf AlmaLinux 8 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
  • libnbd AlmaLinux 8 1.2.2-1.module_el8.5.0+2608+72063365
  • libnbd AlmaLinux 8 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
  • nbdkit AlmaLinux 8 1.16.2-4.module_el8.5.0+2608+72063365
  • libvirt AlmaLinux 8 6.0.0-28.module_el8.3.0+2048+e7a0a3ea

almalinux advisories ALSA-2020:4676

  • hivex Rocky Linux 8 1.3.18-20.module+el8.4.0+534+4680a14e
  • netcf Rocky Linux 8 0.2.8-12.module+el8.7.0+1084+97b81f61
  • netcf Rocky Linux 8 0.2.8-12.module+el8.4.0+534+4680a14e
  • netcf Rocky Linux 8 0.2.8-12.module+el8.6.0+847+b490afdd
  • libnbd Rocky Linux 8 1.2.2-1.module+el8.4.0+534+4680a14e
  • nbdkit Rocky Linux 8 1.16.2-4.module+el8.4.0+534+4680a14e
  • seabios Rocky Linux 8 1.13.0-2.module+el8.4.0+534+4680a14e
  • sgabios Rocky Linux 8 1:0.20170427git-3.module+el8.7.0+1084+97b81f61

rocky linux advisories RLSA-2020:4676

  • libvirt Arch Linux 6.3.0-1

arch linux advisories AVG-1174

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-2020-10703 updated cvss 6.5

libvirt: Potential denial of service via active pool without target path

  • Red Hat Enterprise Linux 8 Advanced Virtualization libvirt, libvirt-nss, libvirt-libs, libvirt-admin, libvirt-client, libvirt-daemon, +22 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder (v. 8) libnbd 1.2.2-1.module+el8.3.0+7353+9de0a3cc, netcf 0.2.8-12.module+el8.1.0+4066+0f1aadab, hivex 1.3.18-20.module+el8.3.0+6423+e4cb6418, nbdfuse 1.2.2-1.module+el8.3.0+7353+9de0a3cc, libvirt 6.0.0-28.module+el8.3.0+7827+5e65edd7, seabios 1.13.0-2.module+el8.3.0+7353+9de0a3cc, +39 more Red Hat Enterprise Linux AppStream (v. 8) libnbd 1.2.2-1.module+el8.3.0+7353+9de0a3cc, netcf 0.2.8-12.module+el8.1.0+4066+0f1aadab, hivex 1.3.18-20.module+el8.3.0+6423+e4cb6418, nbdfuse 1.2.2-1.module+el8.3.0+7353+9de0a3cc, nbdkit 1.16.2-4.module+el8.3.0+6922+fd575af8, libvirt 6.0.0-28.module+el8.3.0+7827+5e65edd7, +88 more
    fixed: vendor fix RHSA-2020:4676
  • Red Hat Enterprise Linux Client (v. 7) libvirt 4.5.0-36.el7, libvirt-libs 4.5.0-36.el7, libvirt-client 4.5.0-36.el7, libvirt-daemon 4.5.0-36.el7, libvirt-daemon-kvm 4.5.0-36.el7, libvirt-bash-completion 4.5.0-36.el7, +18 more Red Hat Enterprise Linux Client Optional (v. 7) libvirt-nss 4.5.0-36.el7, libvirt-admin 4.5.0-36.el7, libvirt-daemon-lxc 4.5.0-36.el7, libvirt-login-shell 4.5.0-36.el7, libvirt-lock-sanlock 4.5.0-36.el7 Red Hat Enterprise Linux ComputeNode (v. 7) libvirt 4.5.0-36.el7, libvirt-libs 4.5.0-36.el7, libvirt-client 4.5.0-36.el7, libvirt-bash-completion 4.5.0-36.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libvirt 4.5.0-36.el7, libvirt-nss 4.5.0-36.el7, libvirt-admin 4.5.0-36.el7, libvirt-daemon 4.5.0-36.el7, libvirt-daemon-kvm 4.5.0-36.el7, libvirt-daemon-lxc 4.5.0-36.el7, +20 more Red Hat Enterprise Linux Server (v. 7) libvirt 4.5.0-36.el7, libvirt-libs 4.5.0-36.el7, libvirt-client 4.5.0-36.el7, libvirt-daemon 4.5.0-36.el7, libvirt-daemon-kvm 4.5.0-36.el7, libvirt-bash-completion 4.5.0-36.el7, +18 more Red Hat Enterprise Linux Server Optional (v. 7) libvirt-nss 4.5.0-36.el7, libvirt-admin 4.5.0-36.el7, libvirt-daemon-lxc 4.5.0-36.el7, libvirt-login-shell 4.5.0-36.el7, libvirt-lock-sanlock 4.5.0-36.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) libvirt 4.5.0-36.el7, libvirt-libs 4.5.0-36.el7, libvirt-client 4.5.0-36.el7, libvirt-daemon 4.5.0-36.el7, libvirt-daemon-kvm 4.5.0-36.el7, libvirt-bash-completion 4.5.0-36.el7, +18 more Red Hat Enterprise Linux Workstation Optional (v. 7) libvirt-nss 4.5.0-36.el7, libvirt-admin 4.5.0-36.el7, libvirt-daemon-lxc 4.5.0-36.el7, libvirt-login-shell 4.5.0-36.el7, libvirt-lock-sanlock 4.5.0-36.el7
    fixed: vendor fix RHSA-2020:4000
  • Red Hat Enterprise Linux 5 libvirt Red Hat Enterprise Linux 6 libvirt, libvirt-client, libvirt-python, libvirt-lock-sanlock
    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

2.38% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1790725 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Affected products

  • libvirt libvirt

Classification

Weakness

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.