CVE-2026-41434

PKCS#11 service interruption via unbounded attribute recursion

Published Jul 6, 2026 · Updated Jul 6, 2026

Stack exhaustion in the PKCS#11 TA in OP-TEE OS 3.10.0 through 4.10.0 allows local users to crash the TA via a crafted object search. sanitize_client_object() and sanitize_indirect_attr() recursively parse nested CKA_WRAP_TEMPLATE attributes without a depth limit, exhausting the TA's 8 KB stack into its guard page. A Normal World caller needs only C_OpenSession(), not C_Login(), and one deeply nested C_FindObjectsInit request kills the single-instance TA and all active PKCS#11 sessions.

CVSS severity3.3
Low
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack exhaustion in the PKCS#11 TA in OP-TEE OS 3.10.0 through 4.10.0 allows local users to crash the TA via a crafted object search. sanitize_client_object() and sanitize_indirect_attr() recursively parse nested CKA_WRAP_TEMPLATE attributes without a depth limit, exhausting the TA's 8 KB stack into its guard page. A Normal World caller needs only C_OpenSession(), not C_Login(), and one deeply nested C_FindObjectsInit request kills the single-instance TA and all active PKCS#11 sessions.

The record

CVE
CVE-2026-41434
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
OP-TEE
Product
OP-TEE OS
Classifications
CWE-121, T1489
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 6, 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=>= 3.10.0, < 4.11.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

OP-TEE · OP-TEE OSversion=>= 3.10.0, < 4.11.0

Published CVSS scores

3.3GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1489Service Stop

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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