libvirt: NULL pointer dereference after running qemuAgentCommand in qemuAgentGetInterfaces function
Published Mar 27, 2019
6.3
MEDIUMCVSS 3.0
EPSS 1.48%
Description
A NULL pointer dereference flaw was discovered in libvirt before version 5.0.0 in the way it gets interface information through the QEMU agent. An attacker in a guest VM can use this flaw to crash libvirtd and cause a denial of service.
Affected products
-
- Version 5.0.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| The libvirt Project | Libvirt | n/a |
|
No data.
Red Hat Enterprise Linux 7
libvirt-0:4.5.0-23.el7
Fixed · RHSA-2019:2294
Red Hat Enterprise Linux 5
libvirt
Not affected
Red Hat Enterprise Linux 6
libvirt
Not affected
Red Hat Enterprise Linux 8
libvirt
Not affected
Red Hat Storage 3
libvirt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | libvirt-0:4.5.0-23.el7 | Fixed | RHSA-2019:2294 |
| Red Hat Enterprise Linux 5 | libvirt | Not affected | n/a |
| Red Hat Enterprise Linux 6 | libvirt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | libvirt | Not affected | n/a |
| Red Hat Storage 3 | libvirt | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H
AV:N/AC:M/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.48% (0.01482) | 73.02th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.51% (0.01510) | 71.04th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.73% (0.00730) | 70.37th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.53% (0.02533) | 75.69th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.73% (0.00730) | 70.99th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.22% (0.00218) | 60.78th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.24% (0.00240) | 62.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.24% (0.00240) | 60.21th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 14.00% (0.14004) | 90.93th | v2 (v2022.01.01) |
| Feb 3, 2022 | 8.63% (0.08626) | 85.56th | v1 |
| Jan 6, 2022 | 8.63% (0.08626) | 85.39th | v1 |
| Jan 5, 2022 | 2.06% (0.02061) | 77.63th | v5 (v2026.06.15) |
| Apr 14, 2021 | 2.06% (0.02061) | 0.00th | v1 |
References (11)
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00101.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00105.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2294 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2019-3840 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1663051 x_refsource_CONFIRMExploitIssue TrackingThird Party AdvisoryVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1665228 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3840 x_refsource_CONFIRMExploitIssue TrackingPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TZRP2BRMI4RYFRPNFTTIAAUOGVN2ORP7/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2019-3840
- https://www.cve.org/CVERecord?id=CVE-2019-3840
- https://www.redhat.com/archives/libvir-list/2019-January/msg00241.html x_refsource_CONFIRMExploitVendor Advisory
Change history (0)
No recorded changes yet.