Status: UPDATED
| Advisory ID: CVE-2026-87799
Key Details
| CVE | CVE-2026-87799 |
| CVSS Score / Version | 9.9 (Critical) / CVSS v3.1 |
| Updated | 2026-09-29 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is low; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is high. |
| Affected products | canonical lxd |
| Classified as | CWE-59 (Improper Link Resolution Before File Access ('Link Following')) |
Affected Products, Subsystems & Sectors
| Subsystems | General OT |
| Sectors | Multiple |
What to Know
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. (NVD)
What to Do
Monitor canonical's web page for any future patch releases.
References