Bug 2529684 (CVE-2026-86566) - CVE-2026-86566 dpdk: dpdk: Guest with runt RX descriptors underflows copy length in vhost enqueue (split and packed rings)
Summary: CVE-2026-86566 dpdk: dpdk: Guest with runt RX descriptors underflows copy len...
Keywords:
Status: NEW
Alias: CVE-2026-86566
Deadline: 2026-12-08
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2552424 2552425
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-08 02:47 UTC by OSIDB Bzimport
Modified: 2026-10-14 15:53 UTC (History)
30 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-09-08 02:47:02 UTC 
A flaw was found in DPDK lib/vhost. Runt RX descriptors underflow the copy length in vhost enqueue on both split and packed rings. Unsigned subtraction underflow allows a full packet copy past a tiny descriptor window, which can crash a host vswitch such as OVS-DPDK.
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