Bug 2497459 (CVE-2026-41516) - CVE-2026-41516 OP-TEE: OP-TEE: Information disclosure via Bleichenbacher-style padding oracle in RSA PKCS#1 v1.5 decryption
Summary: CVE-2026-41516 OP-TEE: OP-TEE: Information disclosure via Bleichenbacher-styl...
Keywords:
Status: NEW
Alias: CVE-2026-41516
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2497716
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-06 20:02 UTC by OSIDB Bzimport
Modified: 2026-07-07 13:38 UTC (History)
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Description OSIDB Bzimport 2026-07-06 20:02:25 UTC 
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`.
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