Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-40257— OP-TEE has SHA-3 accelerated finalize heap overflow

CVSS 5.5 · Medium EPSS 0.11% · P1

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProductVersion RangeStatus
OP-TEEoptee_os>= 3.21.0, < 4.11.0affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-40257

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
OP-TEE has SHA-3 accelerated finalize heap overflow
Source: CVE Program / CVE List V5
Vulnerability Description
OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 3.21.0 and prior to version 4.11.0, the ARM Crypto Extensions accelerated SHA-3 implementation has an off-by-one error that can cause a massive heap overflow that corrupts all TEE kernel memory following the hash state. This affects all platforms built with `CFG_CRYPTO_WITH_CE82=y` (ARMv8.2+ with SHA3 Crypto Extensions). Version 4.11.0 contains a patch. As a workaround, disable SHA3 Crypto Extensions with `CFG_CRYPTO_WITH_CE82=n`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
OP-TEE optee_os 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OP-TEE optee_os是OP-TEE的安全操作系统。 OP-TEE optee_os 3.21.0版本至4.11.0之前版本存在缓冲区错误漏洞，该漏洞源于ARM Crypto Extensions加速SHA-3实现中存在差一错误，可能导致堆溢出，从而破坏哈希状态之后的所有TEE内核内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
OP-TEEoptee_os >= 3.21.0, < 4.11.0 -

II. Public POCs for CVE-2026-40257

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-40257

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-40257 (1)

Same Patch Batch · OP-TEE · 2026-07-06 · 8 CVEs total

CVE-2026-443625.5 MEDIUMOP-TEE's subkey rollback protection can be bypassed with older subkey versions
CVE-2026-425463.8 LOWOP-TEE has missing OPTEE_MSG_ATTR_TYPE_MASK in cleanup_shm_refs() leaks mobj references
CVE-2026-414343.3 LOWOP-TEE has unbounded recursion in sanitize_client_object()
CVE-2026-415142.5 LOWOP-TEE: RSA-OAEP padding oracle in Hisilicon HPRE driver enables plaintext recovery
CVE-2026-415162.5 LOWOP-TEE: Hisilicon HPRE PKCS#1 v1.5 Decryption Padding Oracle
CVE-2026-415152.5 LOWOP-TEE: RSA-OAEP padding oracle in NXP CAAM driver enables plaintext recovery
CVE-2026-53763OP-TEE has AES-GCM 32-bit integer overflow in length counters that breaks authentication g

IV. Related Vulnerabilities

Same product: optee_os
Same vendor: OP-TEE
Same weakness: CWE-787

V. Comments for CVE-2026-40257

No comments yet

Leave a comment