CVE-2026-86848
8.8HighPublished 14 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-367
Impact
A malicious guest VM can escape or trigger out-of-bounds memory access on the host backend, potentially leading to host compromise or crash. The attacker needs local low-privileged access inside a guest VM using vhost-crypto.
Root cause
A time-of-check to time-of-use (TOCTOU) race condition in vhost-crypto double-fetches the indirect-descriptor guest next index.
Affected systems
DPDK lib/vhost vhost-crypto (versions not listed — check the vendor advisory).
CVSS v3.1 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Fix & remediation
Apply vendor security updates for DPDK when released; if patching must wait, disable vhost-crypto acceleration on untrusted guest VMs.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
A flaw was found in DPDK lib/vhost vhost-crypto. The indirect-descriptor snapshot double-fetches a guest descriptor next index, allowing a malicious guest to cause an out-of-bounds access in the host backend.