CVE-2026-86561Public exploit

Host-process crash via unchecked memory mapping size

Published Oct 14, 2026 · Updated Oct 14, 2026

DoS in DPDK 25.11.0 lib/vhost allows local users to crash the host process via crafted vhost-user memory-region messages. The vhost_user_mmap_region() function maps a supplied memory size without checking the backing file's actual length, leaving subsequent accesses beyond that file unsafe. Exploitation requires access to the vhost-user Unix socket; the reported crash interrupts networking for guests sharing the process.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DoS in DPDK 25.11.0 lib/vhost allows local users to crash the host process via crafted vhost-user memory-region messages. The vhost_user_mmap_region() function maps a supplied memory size without checking the backing file's actual length, leaving subsequent accesses beyond that file unsafe. Exploitation requires access to the vhost-user Unix socket; the reported crash interrupts networking for guests sharing the process.

The record

CVE
CVE-2026-86561
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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