Quick answers
- Is CVE-2026-86846 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86846 being exploited in the wild.
- How severe is CVE-2026-86846?
- Medium severity, with a CVSS score of 6.5, published 14 October 2026.
- Which products and versions are affected?
- DPDK <UNKNOWN>.
- Is there a fix for CVE-2026-86846?
- 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-2026-86846 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-86846?
- Check whether you run DPDK at an affected version. 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 is an out-of-bounds write (CWE-787) in DPDK's lib/vhost vhost-crypto backend. A guest with access to a virtio-crypto vhost-user device can supply an avail-ring descriptor index that lacks bounds checking, leading to an out-of-bounds write in host memory. Attack requires local/adjacent network access from the guest, low privileges, and no user interaction; impact is primarily availability (host crash or instability).
Affected products
- DPDK DPDK <UNKNOWN>
Timeline
- 2026-10-14: disclosed