CVE-2026-10673Public exploit

Kernel memory corruption via unchecked OA frame lengths

Published Jul 15, 2026 · Updated Jul 15, 2026

Out-of-bounds access in Zephyr RTOS 3.7.0 through 4.4.1 allows attackers to corrupt kernel memory via Ethernet traffic. In OA SPI mode, eth_adin2111_oa_data_read() trusts wire-derived chunk counts and lengths, allowing the reassembly cursor and undersized transfer buffers to cross fixed bounds. Reachability requires an ADIN2111 or ADIN1110 interface on the same single-pair Ethernet segment; exploitation needs no authentication or user interaction and can wedge the link or enable further compromise.

CVSS severity8.3
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Zephyr RTOS 3.7.0 through 4.4.1 allows attackers to corrupt kernel memory via Ethernet traffic. In OA SPI mode, eth_adin2111_oa_data_read() trusts wire-derived chunk counts and lengths, allowing the reassembly cursor and undersized transfer buffers to cross fixed bounds. Reachability requires an ADIN2111 or ADIN1110 interface on the same single-pair Ethernet segment; exploitation needs no authentication or user interaction and can wedge the link or enable further compromise.

The record

CVE
CVE-2026-10673
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-787, CWE-125, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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=3.7.0 <4.5.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Zephyr Project · Zephyr RTOSversion=3.7.0 <4.5.0

Published CVSS scores

8.3Zephyr ProjectCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-125Out-of-bounds Read
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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