Vulnerability Details CVE-2026-41514
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`.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 0.9%
CVSS Severity
CVSS v3 Score 2.5
Products affected by CVE-2026-41514
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cpe:2.3:o:trustedfirmware:op-tee:4.10.0
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cpe:2.3:o:trustedfirmware:op-tee:4.5.0
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cpe:2.3:o:trustedfirmware:op-tee:4.6.0
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cpe:2.3:o:trustedfirmware:op-tee:4.7.0
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cpe:2.3:o:trustedfirmware:op-tee:4.8.0
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cpe:2.3:o:trustedfirmware:op-tee:4.9.0