Quick answers
- Is CVE-2026-86847 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86847 being exploited in the wild.
- How severe is CVE-2026-86847?
- Medium severity, with a CVSS score of 6.5, published 14 October 2026.
- Which products and versions are affected?
- DPDK DPDK.
- Is there a fix for CVE-2026-86847?
- No fixed version is recorded yet. Do not attach a virtio-crypto vhost-user backend to untrusted guests. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-86847 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-86847?
- Check whether you run DPDK. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
Do not attach a virtio-crypto vhost-user backend to untrusted guests.
Technical details
The vulnerability exists in DPDK lib/vhost vhost-crypto where write-back chain cleanup follows an uninitialized next pointer when mapping a guest descriptor fails. This is a CWE-824 (access of uninitialized pointer) issue triggered by a local guest with a virtio-crypto vhost-user device, requiring low privileges. An attacker can cause the host vhost-crypto process to hang or crash, achieving denial of service.
Affected products
- DPDK DPDK
Timeline
- 2026-10-14: disclosed