CVE-2026-87799
Improper link resolution in the migration receive path in Canonical LXD versions 4.0 and later…
- Risk score
- 66/100
- CVSS
- 9.9 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 28 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 …
- Affected
- See advisory
- Fix
- Upgrade the product to 4.0.14, 5.0.10, 5.21.8 or 6.10 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.9 critical
References
Original 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.
Last activity 28 Sep 2026. Patch Forecast updates every hour.