CVE-2026-63294
LXD image/backup import symlink flaw enables host root command execution.
Is CVE-2026-63294 being exploited?
Not confirmed. CVE-2026-63294 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 1.2% probability of exploitation in the next 30 days.
How severe is CVE-2026-63294?
CVE-2026-63294 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-63294?
Yes. A fix has been recorded for CVE-2026-63294. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-63294 affect?
CVE-2026-63294 affects LXD (image/backup import), Linux hosts running LXD, Container hosting/cloud infrastructure. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-63294?
Block untrusted imports, restrict LXD API access, monitor logs, apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can achieve root command execution on the host by supplying a crafted image/backup archive with a symlinked backup.yaml during import/unpack.
Immediate action required
- affected>= 4.0.0 and < 4.0.12
- affected>= 5.0.0 and < 5.0.8
- affected>= 5.21.0 and < 5.21.6
- affected>= 6.0 and < 6.10
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.