Vulnerability Details CVE-2026-41516
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 PKCS#1 v1.5 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 Bleichenbacher-style padding oracle that allows an attacker to recover RSA PKCS#1 v1.5 plaintext. 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-2026-41516
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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