A flaw was found in the libvirt nwfilter driver.
A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to acquire the driver->nwfilters mutex before iterating over virNWFilterObj instances. There was no protection to stop another thread from concurrently modifying the driver->nwfilters object. This flaw allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to crash the network filter management daemon (libvirtd/virtnwfilterd).
- Published
- Mar 25, 2022
- Updated
- Jun 17, 2026
- EPSS
- 1.0% · 63th percentile
- CWE
- CWE-667
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Report tools
Action score
17
Monitor
Low priority for now.
- CVSS
- 17 / 40 · 4.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.0%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| redhat | libvirt | cpe:2.3:a:redhat:libvirt |
| netapp | ontap select deploy administration utility | cpe:2.3:a:netapp:ontap_select_deploy_administration_utility |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- netapp ontap select deploy administration utilityall versions
- redhat libvirtup to 1.1.1 inclusive
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
n/a libvirt
- libvirt 8.0.0-8affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:9 | libvirt | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-client | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-config-network | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-config-nwfilter | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-interface | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-network | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-nodedev | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-nwfilter | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-qemu | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-secret | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-storage | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-storage-core | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-storage-disk | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-storage-iscsi | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-storage-logical | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-storage-mpath | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-storage-rbd | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-driver-storage-scsi | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-daemon-kvm | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-devel | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-docs | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-libs | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
| AlmaLinux:9 | libvirt-lock-sanlock | before 8.5.0-7.el9_1 | 8.5.0-7.el9_1 |
+96
Same product
redhat: all recordsOther highest-scoring records for the same primary product.
- CVE-2016-5008libvirt before 2.0.0 improperly disables password checking when the password on a VNC server is set to an empty string, which allows remote 40Plan
- CVE-2020-14339A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process.35Monitor
- CVE-2019-10132A vulnerability was found in libvirt >= 4.1.0 in the virtlockd-admin.socket and virtlogd-admin.socket systemd units.35Monitor
- CVE-2013-4401The virConnectDomainXMLToNative API function in libvirt 1.1.0 through 1.1.3 checks for the connect:read permission instead of the connect:wr35Monitor
- CVE-2017-1000256libvirt 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 fa33Monitor
- CVE-2019-10168The virConnectBaselineHypervisorCPU() and virConnectCompareHypervisorCPU() libvirt APIs, 4.x.x before 4.10.1 and 5.x.x before 5.4.1, accept 31Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:libvirt | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-client | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-daemon | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-daemon-config-network | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-daemon-config-nwfilter | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-daemon-driver-interface | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-daemon-driver-network | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-daemon-driver-nodedev | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-daemon-driver-nwfilter | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-daemon-driver-qemu | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-daemon-driver-secret | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libvirt-daemon-driver-storage | 8.5.0-7.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| debian:libvirt | 8.2.0-1 · Debian:12 | Package registry (OSV) |
| opensuse:libvirt | 7.1.0-150300.6.29.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| red hat:hivex | 0:1.3.18-23.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:hivex-debuginfo | 0:1.3.18-23.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:hivex-debugsource | 0:1.3.18-23.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:hivex-devel | 0:1.3.18-23.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-appliance | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-bash-completion | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-debuginfo | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-debugsource | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-devel | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-gfs2 | 1:1.44.0-9.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:SLOF | 0:20210217-1.module+el8.7.0+16689+53d59bc2 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| rocky linux:hivex | 0:1.3.18-23.module+el8.7.0+1084+97b81f61 · Rocky Linux:8 | Package registry (OSV) |
| rocky linux:libguestfs | 1:1.44.0-9.module+el8.7.0+1084+97b81f61.rocky · Rocky Linux:8 | Package registry (OSV) |
| rocky linux:libguestfs-winsupport | 0:8.6-1.module+el8.7.0+1084+97b81f61 · Rocky Linux:8 | Package registry (OSV) |
| rocky linux:libiscsi | 0:1.18.0-8.module+el8.7.0+1084+97b81f61 · Rocky Linux:8 | Package registry (OSV) |
+10
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- low · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- Low
Weakness class (CWE)
CWE-667 · Improper LockingCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- bugzilla.redhat.com/show_bug.cgi?id=2063883
- lists.debian.org/debian-lts-announce/2024/04/msg00000.html
- security.gentoo.org/glsa/202210-06
Vendor advisories and official records. Exploit/PoC links are deliberately left out.