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CVE-2026-41516

OP-TEE: Hisilicon HPRE PKCS#1 v1.5 Decryption Padding Oracle

LOW
3.3
CVSS Score
Published: July 6, 2026 at 07:27 PM UTC
Updated: October 25, 2026 at 08:10 PM UTC
2 products affected across 2 vendorsOp TeeOP-TEE

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Severity
LOW3.3
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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 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`.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Op Tee· Trustedfirmware
95%
4.5.0 ≤ v ≤ 4.10.0
OP-TEE· Op Tee
90%
Affected range stops below 4.11.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMMitigationVendor AdvisoryExploitPatch
Source: cverecord
https://github.com/OP-TEE/optee_os/security/advisories/GHSA-wxp6-8wwr-h4gf

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.3LOW[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-208

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