CVE-2026-10774

Resource-exhaustion DoS via unreleased PSA key slots

Published Aug 2, 2026 · Updated Aug 2, 2026

Resource exhaustion in Zephyr RTOS 3.6.0 through 4.4.1 allows remote authenticated users to interrupt Bluetooth Mesh key management. subnet_keys_destroy() places the Private Beacon Key destroy call behind a removed Kconfig symbol, leaving every matching PSA key import unreleased. Under the default 16-slot pool, a device-key holder can exhaust slots after roughly a dozen teardown cycles, preventing subnet creation or key refresh until reboot.

CVSS severity2.4
Low
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Zephyr RTOS 3.6.0 through 4.4.1 allows remote authenticated users to interrupt Bluetooth Mesh key management. subnet_keys_destroy() places the Private Beacon Key destroy call behind a removed Kconfig symbol, leaving every matching PSA key import unreleased. Under the default 16-slot pool, a device-key holder can exhaust slots after roughly a dozen teardown cycles, preventing subnet creation or key refresh until reboot.

The record

CVE
CVE-2026-10774
Published
Aug 2, 2026
Updated
Aug 2, 2026
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-401, T1499
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Aug 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=3.6.0 <4.5.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

Zephyr Project · Zephyr RTOSversion=3.6.0 <4.5.0

Published CVSS scores

2.4Zephyr ProjectCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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