CVE-2026-40251— Incus out-of-bounds panic in snapshot metadata handling allows denial of service

Incus out-of-bounds panic in snapshot metadata handling allows denial of service

Incus is a system container and virtual machine manager. In versions before 7.0.0, missing validation logic in the storage volume import logic allows an authenticated user with access to the storage volume feature to cause the Incus daemon to crash. The backup restore subsystem contains an out-of-bounds panic vulnerability caused by an invalid bounds check when indexing snapshot metadata arrays, and the same flawed pattern also appears in the migration path. When iterating through physical snapshots provided in a backup archive, the loop uses the index to look up corresponding metadata in the parsed `Config.Snapshots` and `Config.VolumeSnapshots` slices. The guard condition `len(slice) >= i-1` is incorrect because it can still evaluate to true when the subsequent slice[i] access is out of bounds. An attacker can submit a backup archive that contains physical snapshot directories while supplying a tampered `index.yaml` with an empty or truncated snapshot metadata array, causing the daemon to index beyond the end of the metadata slice and crash. 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.

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对数组索引的验证不恰当

Incus 输入验证错误漏洞

Incus是LXC开源的一个系统容器和虚拟机管理器。 Incus 7.0.0之前版本存在输入验证错误漏洞，该漏洞源于存储卷导入逻辑中边界检查无效，可能导致经过身份验证的用户通过包含物理快照目录和篡改的index.yaml文件导致越界访问，使守护进程崩溃。

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