Quick answers
- Is CVE-2026-86562 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86562 being exploited in the wild.
- How severe is CVE-2026-86562?
- High severity, with a CVSS score of 7.8, published 14 October 2026.
- Which products and versions are affected?
- DPDK <UNKNOWN>.
- Is there a fix for CVE-2026-86562?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. 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-2026-86562 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-86562?
- 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.
Technical details
A TOCTOU (time-of-check-time-of-use) double-fetch vulnerability exists in DPDK's lib/vhost VDUSE control-queue handler, where control-queue descriptors are fetched twice without proper synchronization. An attacker-controlled guest with access to the VDUSE control virtqueue can exploit this race condition to write attacker-controlled data into heap memory, leading to buffer overflow. This requires local access (guest context) and low privileges.
Affected products
- DPDK DPDK <UNKNOWN>
Timeline
- 2026-10-14: disclosed