CVE-2026-63294

Root RCE via image backup.yaml symlink

Published: Aug 12, 2026Updated: Sep 11, 2026 Sources: CVE List NVDCWE-59

9.9CRITICAL

Description

A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly validate and confine the backup.yaml file when it exists as a symbolic link. An attacker can exploit this flaw by providing a malicious archive with a symlinked backup.yaml file, causing LXD to process unconfined configuration metadata and execute arbitrary commands with root privileges.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-59

Affected Products

Canonical

commercial·GBaka canonical ltd.

LXDOn-prem

Operating Systems / linux-distro

and 1 more affected products View all →

Exploitability

Official Patch Available

Workaround Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Collection

Discovery

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References

https://github.com/canonical/lxd/security/advisories/GHSA-fv82-v4fj-mm4m

github.com

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