CVE-2026-41684— Incus: Nil Dereferences on Restore via Malformed YAML

Incus: Nil Dereferences on Restore via Malformed YAML

Incus is a system container and virtual machine manager. Prior to version 7.0.0, backup.GetInfo() trusts the inline backup/index.yaml config when present and only falls back to parsing the legacy backup/container/backup.yaml file if result.Config == nil. As a result, an archive can carry a valid inline config that passes the initial import preflight while also carrying a malformed legacy backup/container/backup.yaml file that is reparsed later from the restored file system. ParseConfigYamlFile() accepts YAML documents with no container section, and multiple downstream consumers then dereference. Container without checking for nil. Confirmed examples in the instance restore and import flow include backup.UpdateInstanceConfig() and internalImportFromBackup(). An authenticated user with permission to import instance backups may be able to crash the Incus daemon with a crafted backup archive whose inline backup/index.yaml is valid but whose extracted legacy backup.yaml omits container. The crash occurs in the restore path after archive extraction has begun. This issue has been patched in version 7.0.0.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

空指针解引用

Incus 代码问题漏洞

Incus是LXC开源的一个系统容器和虚拟机管理器。 Incus 7.0.0之前版本存在代码问题漏洞，该漏洞源于backup.GetInfo信任内联备份配置，允许携带有效内联配置和格式错误的遗留备份文件，可能导致经过身份验证的用户通过特制备份存档导致Incus守护进程崩溃。

N/A

N/A