CVE-2026-10640

Adjacent memory corruption via post-send packet dereference

Published Jun 16, 2026 · Updated Jun 16, 2026

Use-after-free in Zephyr Project Zephyr RTOS 3.3.0 through 4.4.0 allows remote attackers on the local link to corrupt memory or crash devices. IPv6 Neighbor Discovery send paths call net_pkt_iface after net_send_data releases the packet, then dereference its freed interface pointer while updating per-interface ICMP statistics. Native IPv6 and CONFIG_NET_STATISTICS_PER_INTERFACE must be enabled; an unauthenticated on-link node can reach the flaw with a Neighbor Solicitation.

CVSS severity4.2
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Zephyr Project Zephyr RTOS 3.3.0 through 4.4.0 allows remote attackers on the local link to corrupt memory or crash devices. IPv6 Neighbor Discovery send paths call net_pkt_iface after net_send_data releases the packet, then dereference its freed interface pointer while updating per-interface ICMP statistics. Native IPv6 and CONFIG_NET_STATISTICS_PER_INTERFACE must be enabled; an unauthenticated on-link node can reach the flaw with a Neighbor Solicitation.

The record

CVE
CVE-2026-10640
Published
Jun 16, 2026
Updated
Jun 16, 2026
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-416, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 16, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.3.0 <4.5.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Zephyr Project · Zephyr RTOSversion=3.3.0 <4.5.0

Published CVSS scores

4.2Zephyr ProjectCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
7.1NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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