Skip to content
CVE PROGRAM SOURCE RECORD9.9 Critical

CVE-2026-87799

Arbitrary file write on LXD host via symlink in migration stream

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
canonical

Description

Improper link resolution in the migration receive path in Canonical LXD versions 4.0 and later (fixed in 4.0.14, 5.0.10, 5.21.8 and 6.10) on Linux allows an authenticated client that can create instances or custom storage volumes in a project, or a malicious migration source server, to write attacker-controlled files to arbitrary paths on the target host as root, leading to full host compromise. The attacker does this with a crafted rsync or btrfs send stream that plants a symlink in the transferred volume, such as rootfs or root.img, and then writes through it.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Canonical LXD

Default version status: unaffected

  • 4.0.0 to < 4.0.14affected
  • 5.0.0 to < 5.0.10affected
  • 5.21.0 to < 5.21.8affected
  • 6.0 to < 6.10affected

References