Allows guest-triggered out-of-bounds write in host vhost process; DPDK is widely used in networking/NFV and can lead to host compromise.
CVE-2026-86565
Guest can trigger host OOB write in DPDK vhost, enabling host compromise.
Is CVE-2026-86565 being exploited?
Not confirmed. CVE-2026-86565 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 0.17% probability of exploitation in the next 30 days.
How severe is CVE-2026-86565?
CVE-2026-86565 is rated High with a CVSS score of 8.2. 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-2026-86565?
Yes. A fix has been recorded for CVE-2026-86565. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-86565 affect?
CVE-2026-86565 affects DPDK lib/vhost, vhost-user implementations using DPDK, Host vhost process, Virtual machines/guests interacting with vhost. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-86565?
Apply vendor patch immediately; isolate/untrusted guests and restrict vhost access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Guest can desynchronize virtqueue causing an out-of-bounds write in the host vhost process, enabling host compromise or arbitrary code execution.
Immediate action required