Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD 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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
STABLE
Three critical LXD vulnerabilities, including CVE-2026-87799 (CVSS 9.9), let container users write files as root on the host. Patch to 5.21.8 or 6.10. #LXD #LXDVulnerabilities #Canonical #ContainerSecurity #btrfs #PathTraversal #LinuxSecurity #PatchNow https://securityonline.info/lxd-vulnerabilities-host-root/
Three critical LXD flaws (CVE-2026-87799, CVE-2026-85185, CVE-2026-85526, CVSS up to 9.9) let an authenticated user with instance creation rights write or delete files on the host as root. All three abuse migration or btrfs backup import paths. Risk is highest on shared hosts where many users can create instances. No exploitation reported by Canonical. Fixed in 5.21.8, 5.0.10, 4.0.14 and the latest 6.x. Details: http://vulntracker.io/cves/CVE-2026-87799 #LXD #Canonical #CVE #InfoSec
Unpatched vulnerabilities don't stay hidden on our atlas. #CVE CRITICAL VULNERABILITY DETECTED CVE ID → CVE-2026-87799 Vendor → Unknown Severity → Critical — CVSS 9.9 Product → Unknown Date → 2026-09-28 A critical vulnerability (Link Following) has been disclosed affecting Unknown. Patch immediately. Powered by @Brandefense #ThreatIntel #CyberSecurity #CVE #Unknown