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CVE-2026-40195— Incus nil-pointer dereference in storage bucket import allows denial of service

Quick assessment

Affected
lxc incus
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.

Incus是LXC开源的一个系统容器和虚拟机管理器。 Incus 7.0.0之前版本存在代码问题漏洞，该漏洞源于存储桶导入逻辑中缺少验证逻辑，可能导致经过身份验证的用户通过恶意或格式错误的index.yaml文件导致空指针取消引用，使守护进程崩溃。

AI Predicted 5.5 Difficulty: Easy EPSS 0.44% · P37

Affected Version Matrix 1

VendorProduct Version RangeStatus
lxc incus < 7.0.0 affected
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I. Basic Information for CVE-2026-40195

Vulnerability Information
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Vulnerability Title
Incus nil-pointer dereference in storage bucket import allows denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
Incus is a system container and virtual machine manager. In versions before 7.0.0, missing validation logic in the storage bucket import logic allows an authenticated user with access to the storage bucket feature to cause the Incus daemon to crash. The vulnerability is present in the backup metadata handling logic, where the daemon processes the index.yaml file from an imported archive and accesses members of the parsed backup configuration without first verifying that the configuration object was initialized. A malicious or malformed index.yaml that omits the config block causes a nil-pointer dereference during bucket import operations and terminates the daemon. Repeated use of this issue can be used to keep Incus offline, causing a denial of service. This issue is fixed in version 7.0.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Incus 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Incus是LXC开源的一个系统容器和虚拟机管理器。 Incus 7.0.0之前版本存在代码问题漏洞，该漏洞源于存储桶导入逻辑中缺少验证逻辑，可能导致经过身份验证的用户通过恶意或格式错误的index.yaml文件导致空指针取消引用，使守护进程崩溃。
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
lxc incus < 7.0.0 -

II. Public POCs for CVE-2026-40195

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III. Intelligence Information for CVE-2026-40195

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Vendor Advisories for CVE-2026-40195 (1)

Same Patch Batch · lxc · 2026-05-06 · 4 CVEs total

CVE-2026-40243 Incus OVN TLS verification accepts peer-supplied roots and permits endpoint impersonation
CVE-2026-40251 Incus out-of-bounds panic in snapshot metadata handling allows denial of service
CVE-2026-40197 Incus nil-pointer dereference in custom volume import allows denial of service

IV. Related Vulnerabilities

Same product: incus
Same vendor: lxc
Same weakness: CWE-476

V. Comments for CVE-2026-40195

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