Affects core cloud virtualization; could disrupt cloud infra and lead to host compromise.
CVE-2026-45782
Use-after-free in virtio-block I/O may corrupt host memory.
Is CVE-2026-45782 being exploited?
Not confirmed. CVE-2026-45782 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 0.14% probability of exploitation in the next 30 days.
How severe is CVE-2026-45782?
CVE-2026-45782 is rated High with a CVSS score of 8.9. 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-2026-45782?
Yes. A fix has been recorded for CVE-2026-45782. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45782 affect?
CVE-2026-45782 affects Cloud Hypervisor (v21.0–v51.1). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45782?
Upgrade to 51.2+ or 52.0
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Guest I/O can corrupt host memory; potential host crash or compromise.
Patch when possible
- affected>= 21.0 and < 51.2
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.