CVE-2019-3840
Quick assessment
Affected
The libvirt Project libvirt
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Red Hat libvirt是美国红帽（Red Hat）公司的一个用于实现Linux虚拟化功能的Linux API，它支持各种Hypervisor，包括Xen和KVM，以及QEMU和用于其他操作系统的一些虚拟产品。 Red Hat libvirt中（通过QEMU代理）接收接口消息的方法存在空指针逆向引用漏洞。攻击者可利用该漏洞造成libvirtd崩溃，导致拒绝服务。
Possible ATT&CK Techniques 2 AI
T1499.001 · OS Exhaustion Flood T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2019-3840
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat libvirt 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat libvirt是美国红帽（Red Hat）公司的一个用于实现Linux虚拟化功能的Linux API，它支持各种Hypervisor，包括Xen和KVM，以及QEMU和用于其他操作系统的一些虚拟产品。 Red Hat libvirt中（通过QEMU代理）接收接口消息的方法存在空指针逆向引用漏洞。攻击者可利用该漏洞造成libvirtd崩溃，导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| The libvirt Project | libvirt | 5.0.0 | - |
|
II. Public POCs for CVE-2019-3840
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2019-3840 (3)
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https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3840 x_refsource_CONFIRM
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https://bugzilla.redhat.com/show_bug.cgi?id=1663051 x_refsource_CONFIRM
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Mailing List Discussions for CVE-2019-3840 (3)
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http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00105.html vendor-advisory x_refsource_SUSE
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http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00101.html vendor-advisory x_refsource_SUSE
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TZRP2BRMI4RYFRPNFTTIAAUOGVN2ORP7/ vendor-advisory x_refsource_FEDORA
Other References for CVE-2019-3840 (1)
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https://www.redhat.com/archives/libvir-list/2019-January/msg00241.html x_refsource_CONFIRM
IV. Related Vulnerabilities
Same weakness: CWE-476
-
CVE-2026-108093
Gimp: gimp: denial of service via null pointer dereference i -
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CVE-2026-108063
Libhangul: null pointer dereference in hanja_new() when look -
CVE-2026-107655
Cups: null pointer dereference via embedded job ticket comme -
CVE-2026-107890
CUPS漏洞：空指针解引用致服务崩溃
V. Comments for CVE-2019-3840
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