DEBIAN-CVE-2026-40257
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`.
DEBIAN-CVE-2026-40257
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-40257
optee-os
Source reference: /affected/0/package/name
- Affected versions
- 4.10.0-1
Source reference:
/affected/0/versions4.10.0-2Source reference:
/affected/0/versions4.5.0-2Source reference:
/affected/0/versions4.7.0-1Source reference:
/affected/0/versions4.8.0-1Source reference:
/affected/0/versions4.9.0-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "optee-os",
"purl": "pkg:deb/debian/optee-os?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"4.10.0-1",
"4.10.0-2",
"4.5.0-2",
"4.7.0-1",
"4.8.0-1",
"4.9.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40257.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57578 · Revision 1
- Added to Heist Feed
- Publisher date