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Vulnerability · Published Jul 6, 2026 · Assigned by GitHub_M

CVE-2026-41514OP-TEE: RSA-OAEP padding oracle in Hisilicon HPRE driver enables plaintext recovery

Low 2.5

In plain English

A low-severity security flaw in optee_os from OP-TEE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)2.5Low
Exploit odds (30 days)0.1%top 97.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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`.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13optee-osno fix listedDEBIAN-CVE-2026-41514
Ubuntu:25.10optee-osno fix listedUBUNTU-CVE-2026-41514
Ubuntu:26.04:LTSoptee-osno fix listedUBUNTU-CVE-2026-41514
Ubuntu:26.10optee-osno fix listedUBUNTU-CVE-2026-41514

Affected products (as reported)

VendorProductVersions
OP-TEE optee_os >= 4.5.0, < 4.11.0

Weakness: CWE-208 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

References