Canonical: >> Lxd >> 4.17 Security Vulnerabilities
Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden (lxd/project/limits/permissions.go), which omits raw.apparmor and raw.qemu.conf from the set of keys blocked under the restricted.virtual-machines.lowlevel=block project restriction. A remote attacker with can_edit permission on a VM instance in a restricted project can inject an AppArmor rule and a QEMU chardev configuration that bridges the LXD Unix socket into the guest VM, enabling privilege escalation to LXD cluster administrator and subsequently to host root.
CVSS Score
9.1
EPSS Score
0.001
Published
2026-04-09
In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the supplied tar archive but creates the instance from backup/container/backup.yaml, a separate file in the same archive that is never checked against project restrictions. An authenticated remote attacker with instance-creation permission in a restricted project can craft a backup archive where backup.yaml carries restricted settings such as security.privileged=true or raw.lxc directives, bypassing all project restriction enforcement and allowing full host compromise.
CVSS Score
9.1
EPSS Score
0.001
Published
2026-04-09
In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.
CVSS Score
9.1
EPSS Score
0.001
Published
2026-04-09
Path Traversal in the log file retrieval function in Canonical LXD 5.0 LTS on Linux allows authenticated remote attackers to read arbitrary files on the host system via crafted log file names or symbolic links.
CVSS Score
7.1
EPSS Score
0.001
Published
2025-10-02
Privilege Escalation in operations API in Canonical LXD <6.5 on multiple platforms allows attacker with read permissions to hijack terminal or console sessions and execute arbitrary commands via WebSocket connection hijacking format
CVSS Score
7.4
EPSS Score
0.0
Published
2025-10-02
Information disclosure in image export API in Canonical LXD before 6.5 and 5.21.4 on Linux allows network attackers to determine project existence without authentication via crafted requests using wildcard fingerprints.
CVSS Score
6.9
EPSS Score
0.001
Published
2025-10-02
Information disclosure in images API in Canonical LXD before 6.5 and 5.21.4 on all platforms allows unauthenticated remote attackers to determine project existence via differing HTTP status code responses.
CVSS Score
6.9
EPSS Score
0.001
Published
2025-10-02
Template Injection in instance snapshot creation component in Canonical LXD (>= 4.0) allows an attacker with instance configuration
permissions to read arbitrary files on the host system via specially crafted snapshot pattern templates using the Pongo2 template engine.
CVSS Score
7.1
EPSS Score
0.001
Published
2025-10-02
Information Spoofing in devLXD Server in Canonical LXD versions 4.0 and above on Linux container platforms allows attackers with root privileges within any container to impersonate other containers and obtain their metadata, configuration, and device information via spoofed process names in the command line.
CVSS Score
5.1
EPSS Score
0.001
Published
2025-10-02
Mark Laing discovered in LXD's PKI mode, until version 5.21.1, that a restricted certificate could be added to the trust store with its restrictions not honoured.
CVSS Score
3.8
EPSS Score
0.001
Published
2024-12-06
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