Bug 2497695 - CVE-2026-40257 optee_os: OP-TEE: Memory corruption due to heap overflow in ARM Crypto Extensions SHA-3 implementation [fedora-all]
Summary: CVE-2026-40257 optee_os: OP-TEE: Memory corruption due to heap overflow in AR...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: optee_os
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Enric Balletbo i Serra
QA Contact:
URL:
Whiteboard: {"flaws": ["7cf0f7f6-f4d8-4fc0-8684-e...
Depends On:
Blocks: CVE-2026-40257
TreeView+ depends on / blocked
 
Reported: 2026-07-07 12:29 UTC by Keith Grant
Modified: 2026-07-07 12:29 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
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Type: ---
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Description Keith Grant 2026-07-07 12:29:53 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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 3.21.0 and prior to version 4.11.0, the ARM Crypto Extensions accelerated SHA-3 implementation has an off-by-one error that can cause a massive heap overflow that corrupts all TEE kernel memory following the hash state. This affects all platforms built with `CFG_CRYPTO_WITH_CE82=y` (ARMv8.2+ with SHA3 Crypto Extensions). Version 4.11.0 contains a patch. As a workaround, disable SHA3 Crypto Extensions with `CFG_CRYPTO_WITH_CE82=n`.
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