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CVE-2026-41514

OP-TEE: RSA-OAEP padding oracle in Hisilicon HPRE driver enables plaintext recovery

Published: Jul 6, 2026Updated: Jul 7, 2026 Sources: CVE List NVDCWE-208
2.5LOW
NVD MITRE
EPSS Score
0.1%
Top 99.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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 4.5.0 and prior to version 4.11.0, the RSA-OAEP decryption implementation in the Hisilicon HPRE crypto driver uses non-constant-time `memcmp()` for label hash verification and has multiple distinguishable error paths. This creates a Manger-style padding oracle that allows an attacker to recover RSA-OAEP plaintext with approximately 1000-2000 adaptive chosen ciphertext queries. Only affects plat-d06 with `CFG_HISILICON_ACC_V3=y`, which seems to be disabled by default. Version 4.11.0 contains a patch. As a workaround, disable Hisilicon HPRE RSA driver with `CFG_HISILICON_ACC_V3=n`.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:HPR:LUI:NS:UC:LI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-208

Affected Products

trustedfirmware
commercialaka mbed tls, op-tee, trusted firmware-a
op-teeOn-prem
Security Products / pki-crypto
OP-TEE
oss-projectaka op-tee os, optee
optee_osEmbedded
Operating Systems / rtos-embedded-os

Exploitability

Official Patch Available

References

https://github.com/OP-TEE/optee_os/security/advisories/GHSA-qw4r-9wj9-q23r
github.com

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